Goods & Services

Satellite buses and components thereof, namely, structural parts for satellites; Satellite buses, namely, electrical power systems, thermal controls, communication systems, navigation control system; Satellite components, namely, transponders, sensors, antennas, lasers, satellite dishes, transmitters and receivers Spacecraft, namely, satellite buses; Full line of satellite buses; Satellite buses and the structural and operational hardware and recorded software for satellite buses sold as a unit serving as a standard payload or host for space instruments

Abstract

Systems and methods for providing an electrically small antenna are provided. The antenna can include an arm or a pair of arms disposed on a surface of a substrate. The substrate and the arm or arms are generally disposed in an aperture or volume formed in a housing. A capacitive gap is provided between the arm and the housing, or between the arms. Where the antenna includes a pair of arms, each arm generally includes a main portion disposed on the first surface of the substrate and a perpendicular portion that extends from the first surface of a substrate towards a ground plane on a second surface of the substrate. The perpendicular portions of the arms face one another. In addition, the main portions of the arms can be tapered in plan view. A ground plane can be provided on the second surface side of the substrate.

IPC Classes  ?

• H01Q 7/00 - Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
• H01Q 1/48 - Earthing meansEarth screensCounterpoises
• H01Q 21/22 - Antenna units of the array energised non-uniformly in amplitude or phase, e.g. tapered array or binomial array

Abstract

Automated methods and systems for tuning parameters of detectors based on metrics are provided. The tuning methods and systems include using machine learning to adjust registers used for setting detector parameters in an automated fashion to achieve optimal performance in a time-efficient manner. The tuning process can include determining available registers provided by the detector and setting values within those registers to a starting value. A binary search in either direction from the starting value is then performed to determine the limits of the parameter values for each register. The register values can then be optimized in view of selected metrics.

IPC Classes  ?

• G06F 1/24 - Resetting means
• G06F 9/30 - Arrangements for executing machine instructions, e.g. instruction decode
• G06F 9/4401 - Bootstrapping

Abstract

Suspension system structures and methods are provided. A system as disclosed includes a supported object that is mounted to a post by a first two axis gimbal. The system also includes a reaction mass that is mounted to the post by a second two axis gimbal. The supported object and the reaction mass are connected to one another by a drive assembly. The drive assembly transfers a rotation of the reaction mass about either of the two axes in a first direction to a rotation of the supported object about a parallel axis in an opposite direction.

IPC Classes  ?

• G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
• G02B 26/10 - Scanning systems

Abstract

Multi-spectral methods and systems for the day and night remote sensing (detection, identification, and quantification) of greenhouse gas emission sources (128) from space are provided. The sensor system (104) includes a telescope assembly (220) that passively collects light (124) from an observation area (112) and directs that light (124) through spectral, optical filters (232) and to a sensor array (236) having a plurality of rows and columns of pixels. Different groups of sensor array pixel rows (604) are aligned to receive light that has passed through different optical filters (404a-j). The filters (404a-j) have passbands (504a-j) corresponding to the reflective and emissive bands of gases of interest, as well as associated reflective and emissive reference bands, and broadband spectral bands. A set of image data frames is obtained as the field of view (116) of the sensor system moves over an observation area (112) and an aggregate image showing locations of detected gas emissions (120) is generated using the collected data.

IPC Classes  ?

• G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
• G01N 21/3504 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
• G01S 17/95 - Lidar systems, specially adapted for specific applications for meteorological use
• G01N 21/359 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated
• G01N 21/35 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
• G01J 3/28 - Investigating the spectrum

Abstract

Multi-spectral methods and systems for the day and night remote sensing (detection, identification, and quantification) of greenhouse gas emission sources from space are provided. The sensor system includes a telescope assembly that passively collects light from an observation area and directs that light through spectral, optical filters and to a sensor array having a plurality of rows and columns of pixels. Different groups of sensor array pixel rows are aligned to receive light that has passed through different optical filters. The filters have passbands corresponding to the reflective and emissive bands of gases of interest, as well as associated reflective and emissive reference bands, and broadband spectral bands. A set of image data frames is obtained as the field of view of the sensor system moves over an observation area and an aggregate image showing locations of detected gas emissions is generated using the collected data.

IPC Classes  ?

• G01N 21/3504 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
• F25B 9/14 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
• G02B 5/20 - Filters
• H04N 25/20 - Circuitry of solid-state image sensors [SSIS]Control thereof for transforming only infrared radiation into image signals
• H04N 25/768 - Addressed sensors, e.g. MOS or CMOS sensors for time delay and integration [TDI]

Abstract

Systems and methods for providing a high gain antenna are disclosed. The antenna can include an array of active antenna elements disposed on a first side of a first circuit board. The active antenna elements are grouped into a number of super elements. Each super element occupies at least a portion of an outside edge of an area containing the active antenna elements. Passive antenna elements can be disposed so as to surround the area containing the active antenna elements. Passive circuit components can be disposed on a second side or on an intermediate layer of the first circuit board. Active circuit components can be disposed on a second circuit board. The active components can be supplied with power and control signals. The first and second circuit boards can be held together by a housing. The antenna can be configured as conformal array antennas.

IPC Classes  ?

• H01Q 21/00 - Antenna arrays or systems
• H01Q 1/42 - Housings not intimately mechanically associated with radiating elements, e.g. radome
• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
• H01Q 21/20 - Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along, or adjacent to, a curvilinear path

Abstract

Multi-spectral methods and systems for the day and night remote sensing (detection, identification, and quantification) of greenhouse gas emission sources from space are provided. The sensor system includes a telescope assembly that passively collects light from an observation area and directs that light through spectral, optical filters and to a sensor array having a plurality of rows and columns of pixels. Different groups of sensor array pixel rows are aligned to receive light that has passed through different optical filters. The filters have passbands corresponding to the reflective and emissive bands of gases of interest, as well as associated reflective and emissive reference bands, and broadband spectral bands. A set of image data frames is obtained as the field of view of the sensor system moves over an observation area and an aggregate image showing locations of detected gas emissions is generated using the collected data.

IPC Classes  ?

• G01N 21/3504 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
• F25B 9/14 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
• G02B 5/20 - Filters
• G02B 5/26 - Reflecting filters
• H04N 25/20 - Circuitry of solid-state image sensors [SSIS]Control thereof for transforming only infrared radiation into image signals
• H04N 25/768 - Addressed sensors, e.g. MOS or CMOS sensors for time delay and integration [TDI]

Abstract

Systems and methods for providing a spacecraft are provided. The spacecraft includes a main structural member that extends between end panels of the spacecraft, and that defines a first interior volume. A fuel tank is disposed within and conforms to at least a portion of the first interior volume. The fuel tank can itself include a central void that defines a second interior volume. The main structural member and the fuel tank can be cylindrical. Payload items or components of the spacecraft can be disposed within the second interior volume.

IPC Classes  ?

• B64G 1/10 - Artificial satellitesSystems of such satellitesInterplanetary vehicles
• B64G 1/22 - Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
• B64G 1/64 - Systems for coupling or separating cosmonautic vehicles or parts thereof, e.g. docking arrangements
• B64G 1/40 - Arrangements or adaptations of propulsion systems

Abstract

Attestation of an electronic device provides assurances that the device is trustworthy and operating as intended or, at least, within acceptable parameters. Methods and systems are provided herein wherein a device under test (DUT) is subject to tests, the results of which are provided to a trust verifier (TV) to indicate whether the DUT passed or failed. To protect the integrity of the test from being discovered by malware, the test logic is developed “off board” and only machine code is provided to the DUT. Similarly, memory values and other data of the DUT are not revealed to the TV, which is only provided with test results.

IPC Classes  ?

• G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities

Abstract

Systems and methods for providing a solar cell array with a reduced magnetic field are provided. The systems include a plurality of solar cells arrayed on a first surface side of a substrate. The solar cells are electrically connected to one another in series by a first conductor structure at least partially disposed on the first surface side of the substrate, forming a solar cell or supply circuit. A second conductor structure in series with the solar cell circuit is at least partially disposed on the second surface side of the substrate, forming a return harness. The supply circuit and the return harness define current paths that are opposite one another, and that are separated from one another by the substrate. The first and second conductor structures can be formed from conductive traces on the first and second sides respectively of the substrate.

IPC Classes  ?

• H01L 31/05 - Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells

Abstract

Spacecraft propulsion systems and methods featuring a first storage tank containing a metallic propellant and a second storage tank containing a non-metallic propellant are provided. A selected one of the metallic propellant and the non-metallic propellant is supplied to an electric propulsion thruster, depending on an operational mode of the spacecraft. The metallic propellant is stored at a relatively high density, while the non-metallic propellant is stored at a lower density than the metallic propellant. Moreover, the non-metallic propellant is preferably utilized to produce thrust through the electric propulsion thruster during operational maneuvers, while the metallic propellant is reserved for producing thrust through the electric propulsion thruster during end-of-life, such as deorbiting, maneuvers.

IPC Classes  ?

• B64G 1/40 - Arrangements or adaptations of propulsion systems
• B64G 1/26 - Guiding or controlling apparatus, e.g. for attitude control using jets

Abstract

Imaging systems and methods that enable multiple detectors to be used to capture multiple component images that can be fused to create a composite image of a scene, without introducing gaps in that composite image in areas corresponding to the boundaries of the detectors, are provided. The system includes imaging optics, such as a telescope, that at least in part define an optical path extending between an exit pupil and a focal plane. Field segmentation optics are located within the optical path, to create multiple, partially overlapping component images. At least one detector is provided to produce an image signal representing each of the component images. A composite image is then formed by registering and fusing the component images.

IPC Classes  ?

• H04N 23/45 - Cameras or camera modules comprising electronic image sensorsControl thereof for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images
• H04N 23/80 - Camera processing pipelinesComponents thereof
• G03B 17/17 - Bodies with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera

Abstract

Star tracker systems and methods are provided. The star tracker incorporates deep learning processes in combination with relatively low cost hardware components to provide moderate (e.g. ˜1 arc second attitude uncertainty) accuracy. The neural network implementing the deep learning processes can include a Hinton's capsule network or a coordinate convolution layer to maintain spatial relationships between features in images encompassing a plurality of features. The hardware components can be configured to collect a blurred or defocused image in which point sources of light appear as blurs, and in which the blurs create points of intersection. Alternatively or in addition, a blurred or defocused image can be created using processes implemented as part of application programming. The processing of collected images by a neural network to provide an attitude determination can include analyzing a plurality of blurs and blur intersections across an entire frame of image data.

IPC Classes  ?

• B64G 1/00 - Cosmonautic vehicles
• B64G 1/36 - Guiding or controlling apparatus, e.g. for attitude control using sensors, e.g. sun-sensors, horizon sensors
• G01S 3/786 - Systems for determining direction or deviation from predetermined direction using adjustment of orientation of directivity characteristics of a detector or detector system to give a desired condition of signal derived from that detector or detector system the desired condition being maintained automatically
• G06T 5/00 - Image enhancement or restoration
• G06T 7/246 - Analysis of motion using feature-based methods, e.g. the tracking of corners or segments
• G06N 3/08 - Learning methods
• G06N 3/04 - Architecture, e.g. interconnection topology
• G06V 10/40 - Extraction of image or video features
• G06F 18/214 - Generating training patternsBootstrap methods, e.g. bagging or boosting
• H04N 23/54 - Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
• H04N 23/55 - Optical parts specially adapted for electronic image sensorsMounting thereof

Abstract

Optical image sensor systems and process for simultaneously tracking multiple stationary or moving objects to provide attitude and geolocation information are provided. The objects are detected and tracked within subframe areas defined within a field of view of the image sensor system. Multiple objects within the field of view can be detected and tracked using parallel processing streams. Processing subframe areas can include applying precomputed detector data to image data. Image data within each subframe area obtained from a series of image frames is aggregated to enable the centroid of an object within a particular subframe to be located. Information from an inertial measurement unit can be applied to maintain a stationary object, such as a star, at the center of a respective subframe. Ephemeris data can be applied in combination with the information from the IMU to track a resident space object traversing a known trajectory.

IPC Classes  ?

• G01C 21/02 - NavigationNavigational instruments not provided for in groups by astronomical means
• G06V 10/22 - Image preprocessing by selection of a specific region containing or referencing a patternLocating or processing of specific regions to guide the detection or recognition
• G06V 10/75 - Organisation of the matching processes, e.g. simultaneous or sequential comparisons of image or video featuresCoarse-fine approaches, e.g. multi-scale approachesImage or video pattern matchingProximity measures in feature spaces using context analysisSelection of dictionaries
• G06V 20/64 - Three-dimensional objects

Abstract

A Lidar system is provided. The Lidar system includes a laser emitter transmitting a first signal of a first wavelength. The Lidar system includes a filter receiving the first signal. The Lidar system includes a first dichroic filter switch filtering the first signal received by the variable waveplate or other filter. The Lidar system includes a receiver sensor receiving the filtered first signal. The Lidar system includes the laser emitter transmitting a second signal of a second wavelength. The Lidar system includes the variable waveplate or other filter receiving the second signal. The Lidar system includes the first dichroic filter switch filtering the second signal. The Lidar system includes the receiver sensor receiving the filtered second signal. A processor determines a distance of a target based on the received filtered first and second signals.

IPC Classes  ?

• G01S 7/481 - Constructional features, e.g. arrangements of optical elements
• G01S 17/88 - Lidar systems, specially adapted for specific applications
• G02B 27/14 - Beam splitting or combining systems operating by reflection only
• G01J 3/02 - SpectrometrySpectrophotometryMonochromatorsMeasuring colours Details
• G01B 11/02 - Measuring arrangements characterised by the use of optical techniques for measuring length, width, or thickness
• G01C 3/00 - Measuring distances in line of sightOptical rangefinders
• G01C 3/08 - Use of electric radiation detectors
• G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging

Abstract

Systems and methods for obtaining images of a lunar surface and cislunar space using a hybrid telescope are provided. One hybrid telescope is carried by each of two spacecraft. Each spacecraft is in an elliptical orbit about the Moon. The periapsides of the spacecraft orbits are 180° apart from one another. In addition, the spacecraft can be phased 180° apart from one another to enable an offset in access times of each telescope to the cislunar and surface domains respectively. The image sensors associated with the telescopes can include a staring mode for collecting images from cislunar space, and a scanning mode for collecting images from the lunar surface.

IPC Classes  ?

• B64G 1/10 - Artificial satellitesSystems of such satellitesInterplanetary vehicles
• B64G 1/24 - Guiding or controlling apparatus, e.g. for attitude control

Abstract

Systems and methods for measuring relative velocities of platforms are provided. More particularly, light of a single wavelength is directed from a primary platform to a secondary platform as a probe signal. A shift in the frequency of the probe signal caused by a different relative velocity of the platforms is measured. The measurement is performed by using a heterodyne signal produced by mixing the return signal with light at a plurality of different, evenly spaced frequencies, provided from a local oscillator in the form of a frequency comb generator. This configuration enables precise measurements of relative velocity over wide range of velocities.

IPC Classes  ?

• G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
• G01S 7/481 - Constructional features, e.g. arrangements of optical elements

Abstract

Sensor systems and methods that provide an output in the form of a rate at which light is received by unit pixels within a sensor array are provided. Each unit pixel includes a photodetector that generates an electrical charge in response to receiving light, a charge accumulation area, and a comparator. Once the amount of charge in the accumulation area has reached some threshold amount, a counter is incremented. After the counter has been incremented a selected number of times, an output signal is generated, and the time at which the output signal is generated is marked or recorded. Different unit pixels receiving light at different rates therefore generate output signals at different times.

IPC Classes  ?

• H04N 25/443 - Extracting pixel data from image sensors by controlling scanning circuits, e.g. by modifying the number of pixels sampled or to be sampled by partially reading an SSIS array by reading pixels from selected 2D regions of the array, e.g. for windowing or digital zooming
• H04N 25/772 - Pixel circuitry, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components comprising A/D, V/T, V/F, I/T or I/F converters

Abstract

Systems and methods for providing a broadband antenna are provided. The antenna can include a current sheet array having a plurality of elements. Each of the elements includes dipole arms. The dipole arms can be configured as first and second dipole arm pairs for transmitting or receiving signals of different polarizations. Capacitive structures are provided between adjacent branch portions of the dipole arms. The capacitive structures extend from a first side of a substrate on which the dipole arms are located towards a second side of the substrate.

IPC Classes  ?

• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
• H01Q 9/16 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
• H01Q 1/48 - Earthing meansEarth screensCounterpoises
• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support

Abstract

Radiometer systems and methods that mitigate flicker (1/f) noise are provided. A microwave radiometer system with accuracy impacted by 1/f noise comprises active components which, between measurements, are powered off and on. By powering the active components off and on, 1/f noise is mitigated. Disclosed systems and methods include performing a first measurement with a sensor of a radiometer, after performing the first measurement, switching power to one or more active components of the radiometer off, the active components comprising one or more of an amplifier, a square law detector, and an A/D converter, after switching the power to the one or more active components off, switching the power to the one or more active components on, and after switching the power to the one or more active components on, performing a second measurement with the sensor.

IPC Classes  ?

• G01K 11/00 - Measuring temperature based on physical or chemical changes not covered by group , , , or

Abstract

Image sensor systems and methods that mitigate the effects of electronic image sensor persistence are provided. The mitigation of persistence is achieved by flooding the pixels of the image sensor with light, saturating all of the pixels, prior to the collection of desired image data. Moreover, after saturating the pixels, but prior to collecting the desired image, the image sensor is reset and operated to take an image of a black scene. Due to persistence from the prior saturation step, the image of the black scene appears as a gray image. The image sensor is then optionally reset and is again saturated. After another reset operation, a desired image is obtained. The gray image is then subtracted from the desired image, to substantially correct for the effects of persistence in that image.

IPC Classes  ?

• H04N 17/00 - Diagnosis, testing or measuring for television systems or their details
• H04N 5/235 - Circuitry for compensating for variation in the brightness of the object
• H04N 5/225 - Television cameras

Abstract

Systems and methods for measuring displacements at the picometer level are provided. A system can include a Michelson interferometer having a fixed arm and a measurement arm. As the length of the measurement arm changes, the output supplied to the interferometer from a variable wavelength light source is changed until the intensity of the resulting inference pattern is maximized. The wavelength of the light at the point the interference pattern is maximized is then measured by mixing light from the light source with the output from a frequency comb generator. The resulting frequency measurement is then converted to a length measurement.

IPC Classes  ?

• G01B 9/02001 - Interferometers characterised by controlling or generating intrinsic radiation properties
• G01B 9/02015 - Interferometers characterised by the beam path configuration
• G01B 9/02004 - Interferometers characterised by controlling or generating intrinsic radiation properties using two or more frequencies using frequency scans

Abstract

Systems and methods of calibrating a sensor using an in-path optic capable of remaining in the sensor's optical path of view for both nominal imaging and for solar calibration collects are described. The optic is reversibly switchable between a transparent state and a diffuse state. An electric field aligns a plurality of liquid crystals dispersed in a polymer between two conductive layers is created to enable the transparent state. Incident light is transmitted through the aligned liquid crystals. The electric field between the two conductive layers is removed, misaligning the plurality of liquid crystals dispersed in the polymer between the two conductive layers. Light dispersed by the misaligned liquid crystals is received, and the sensor is calibrated based on the light dispersed by the misaligned liquid crystals.

IPC Classes  ?

• G01J 1/02 - Photometry, e.g. photographic exposure meter Details
• G02F 1/137 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
• G01J 1/04 - Optical or mechanical part

Abstract

An all mechanically controlled, non-venting pressure control system for liquid hydrogen and liquid oxygen cryogenic tanks that requires no electrical control while managing disparate, non-stoichiometric reactant boil-off rates is provided. The pressure control system allows for the passive and repeatable stoichiometric consumption of hydrogen and oxygen boil-off from cryogenic tanks to form liquid water, while preventing the liquid hydrogen and liquid oxygen cryogenic tanks from overpressurizing and venting to the external environment. More particularly, in response to an overpressure condition in a first reactant reservoir, a backpressure regulator is opened, providing the overpressure first reactant to a fuel cell or other consumer, and providing a pilot signal to open a supply line from a second reactant reservoir to the consumer. Whether the second reactant is supplied from the second reactant reservoir as gas or a liquid is determined based on the pressure within the second reactant reservoir.

IPC Classes  ?

• H01M 8/04 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
• B63G 8/00 - Underwater vessels, e.g. submarines
• H01M 8/04082 - Arrangements for control of reactant parameters, e.g. pressure or concentration
• H01M 8/04089 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
• H01M 8/0438 - PressureAmbient pressureFlow
• H01M 8/04537 - Electric variables
• H01M 8/04746 - PressureFlow

Abstract

A system for communication is provided. The system includes an emitter transmitting a first code of a first wavelength. The system includes a filter or variable waveplate receiving the first code. The system includes a receiver sensor receiving the filtered first code. The system includes the emitter transmitting a second code of a second wavelength. The system includes the variable waveplate or other filter receiving the second signal. The system includes the receiver sensor receiving the filtered second code. The first and second codes may be used for communication, synchronizing the emitter, and other purposes.

IPC Classes  ?

• H04B 10/50 - Transmitters
• G02B 27/10 - Beam splitting or combining systems
• H04B 10/516 - Details of coding or modulation
• H04B 10/572 - Wavelength control
• H04B 10/67 - Optical arrangements in the receiver

Abstract

Systems and methods for refueling a chemical propulsion system are provided. The systems can include multiple pressurant reservoirs to supply pressure to one or more fuel tanks. During a refueling operation, pressurant is released, fuel is added to the fuel tank, and then the fuel tank is repressurized using pressurant from a secondary pressurant tank. In other configurations, during a refueling operation pressurant is cooled to depressurize the fuel tank, fuel is added to the fuel tank, and then the pressurant is heated to repressurize the fuel tank. The systems and methods can be used to refuel operationally deployed space craft.

IPC Classes  ?

• B64G 1/40 - Arrangements or adaptations of propulsion systems
• F02K 9/50 - Feeding propellants using pressurised fluid to pressurize the propellants
• F02K 9/58 - Propellant feed valves
• F02K 9/44 - Feeding propellants
• B64G 5/00 - Ground equipment for vehicles, e.g. starting towers, fuelling arrangements
• F02K 9/60 - Constructional partsDetails not otherwise provided for

Abstract

Chemical propellant storage and supply systems and methods for use on spacecraft are provided. The systems and methods include a fluid pump for moving chemical propellant within the system at selected pressures. This can include operating the fluid pump to supply propellant to a thruster system at a selected pressure. A fuel tank can be refilled by connecting a propellant resupply source to the system, and operating the fluid pump to move propellant from the propellant resupply source to the fuel tank. In a system with multiple fuel tanks, the fluid pump can be operated to move propellant from a donor fuel tank to a recipient fuel tank. The chemical propellant can be stored in one or more fuel tanks at a relatively low pressure. In addition, the chemical propellant is not pressurized by a gaseous pressurant while it is stored in the fuel tank.

IPC Classes  ?

• B64G 1/40 - Arrangements or adaptations of propulsion systems
• F02K 9/58 - Propellant feed valves
• F02K 9/46 - Feeding propellants using pumps
• F02K 9/44 - Feeding propellants
• F02K 9/56 - Control
• F02K 9/42 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant thereforControl thereof using liquid or gaseous propellants
• F02K 9/50 - Feeding propellants using pressurised fluid to pressurize the propellants
• B64G 1/64 - Systems for coupling or separating cosmonautic vehicles or parts thereof, e.g. docking arrangements

Abstract

Phased array antenna systems and methods for operating phased array antenna systems to efficiently generate multiple beams from a single phased array aperture are disclosed. Elements included in a phased array antenna are randomly assigned to generate one of first or second beams. A phase index for the first set of elements is iterated n times, and a total difference in phase amounts for neighboring elements belonging to different ones of the first and second sets is calculated for each of the n iterations. The phase index resulting in the smallest calculated difference is applied to generate the first beam. The first and second beams are generated from the single phased array aperture simultaneously.

IPC Classes  ?

• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04W 16/28 - Cell structures using beam steering

Abstract

An antenna system with integrated electromagnetic interference (EMI) shielded heat sink is disclosed. The system includes an antenna circuit board with a plurality of antenna or radiating elements formed on a common plane comprising a first surface. Circuit elements are placed on a second surface of the antenna circuit board. In addition, the second surface of the antenna circuits board is connected to a pocketed EMI shielding cover with individual shield pockets serving as an EMI shield and a heat sink containing a cooling fluid. At least some adjacent pockets can be in fluid communication with one another.

IPC Classes  ?

• H01Q 1/52 - Means for reducing coupling between antennas Means for reducing coupling between an antenna and another structure
• H01Q 1/00 - Details of, or arrangements associated with, antennas
• H01Q 3/30 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase

Abstract

A novel architecture for a network of deep reinforcement modules that enables cross-functional and multi-system coordination of autonomous systems for self-optimization with a reduced computational footprint is disclosed. Each deep reinforcement module in the network is comprised of either a single artificial neural network or a deep reinforcement module sub-network. DReMs are designed independently, decoupling each requisite function. Each module of a deep reinforcement module network is trained independently through deep reinforcement learning. By separating the functions into deep reinforcement modules, reward functions can be designed for each individual function, further simplifying the development of a full suite of algorithms while also minimizing training time. Following training, the DReMs are integrated into the full deep reinforcement module network, which is then refined through additional reinforcement training or genetic multi-objective optimization to maximize the overall performance of the network.

IPC Classes  ?

• G06N 3/08 - Learning methods
• G06N 3/04 - Architecture, e.g. interconnection topology
• G06T 7/20 - Analysis of motion

Abstract

Systems and methods for providing a broadband antenna are described. The systems and methods involved providing a current sheet array. The current sheet array comprises a plurality of unit cells coupled together. Each unit cell comprises a slot and a stripline feed. The stripline feed couples to a dipole array through the slot. An electric field in the slot of a first unit cell is perpendicular to one or more of the stripline feed of the first unit cell and one or more dipoles of the first unit cell.

IPC Classes  ?

• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
• H01Q 21/00 - Antenna arrays or systems
• H01Q 1/48 - Earthing meansEarth screensCounterpoises

Abstract

A spacecraft sunshade is provided. The sunshade includes a surface that is maintained in a sun facing orientation. Adjustments to a position of the sunshade are made in a plane that is transverse to a line of sight to the sun, in order to block sunlight from being directly incident on an instrument associated with the spacecraft. The sunshade can include photovoltaic elements on the sun-facing surface of the sunshade. In addition, the sunshade can be formed from an opaque material, and further from a material that absorbs heat from the sun and reradiate that heat to the instrument. The sunshade can perform stray light blocking, electrical power generation, and radiational heating functions.

IPC Classes  ?

• B64G 1/54 - Protection against radiation
• B64G 1/44 - Arrangements or adaptations of power supply systems using radiation, e.g. deployable solar arrays
• B64G 1/58 - Thermal protection, e.g. heat shields

Abstract

Systems and methods for limiting rotation of a supported object about an axis of rotation are provided. A system as disclosed includes a stop system that engages at a selected amount of rotation about an axis of rotation to provide a balanced force countering further rotation. The stop system includes one or more pairs of stop mechanisms, with one stop mechanism in a pair disposed to act from a first side of the axis of rotation, and a second stop mechanism in the pair disposed to act from a second side of the axis of rotation. Each stop mechanism can include stops that engage a flexure at a selected amount of rotation.

IPC Classes  ?

• F16M 11/12 - Means for attachment of apparatusMeans allowing adjustment of the apparatus relatively to the stand allowing pivoting in more than one direction
• F16F 15/04 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using elastic means
• F16C 11/12 - Pivotal connections incorporating flexible connections, e.g. leaf springs
• F16C 11/10 - Arrangements for locking

Abstract

A hetero-junction phototransistor with a first layer comprising an InP N buffer and substrate, a second layer comprising an InGaAs N collector on the InP N buffer and substrate, a plurality of InGaAs P bases on the InGaAs N collector layer, and a plurality of InAIAs N emitters is described. Each emitter of the plurality of InAIAs N emitters is on a different base of the plurality of InGaAs P bases. The hetero-junction phototransistor comprises a plurality of InGaAs N+ caps, wherein each cap of the plurality of InGaAs N+ caps is on a different emitter of the plurality of InAIAs N emitters. The hetero-junction phototransistor comprises one or more electrical contacts. Each of the one or more electrical contacts is on a different cap of the plurality of InGaAs N+ caps.

IPC Classes  ?

• H01L 31/062 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof adapted as photovoltaic [PV] conversion devices characterised by at least one potential-jump barrier or surface barrier the potential barriers being only of the metal-insulator-semiconductor type
• H01L 31/113 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by field-effect operation, e.g. junction field-effect photo- transistor being of the conductor-insulator- semiconductor type, e.g. metal- insulator-semiconductor field-effect transistor
• H01L 29/66 - Types of semiconductor device
• H01L 31/0304 - Inorganic materials including, apart from doping materials or other impurities, only AIIIBV compounds
• H01L 29/778 - Field-effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT
• H01L 29/20 - Semiconductor bodies characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds

Abstract

Systems and methods for operating a focal plane array are provided. The operations can be stored as command sequences stored in a command queue established in memory provided as part of reconfigurable focal plane electronics. Each command sequence can include definitions of a plurality of image frames that are executed in series. The configurations of the defined frames can be the same as or different from one another. Moreover, the frame definitions can specify a number of focal plane array parameters, such as gain, full frame or window, and integration time. The sequence of focal plane array parameters can be provided to the focal plane array as a command stream at the direction of a state machine implemented by the reconfigurable focal plane electronics. New commands containing different frame commands can be loaded into the command queue without requiring reconfiguration of the electronics.

IPC Classes  ?

• H04N 5/232 - Devices for controlling television cameras, e.g. remote control
• G03B 9/16 - Two separate members moving in the same direction
• G03B 9/62 - Means for varying duration of "open" period of shutter by varying interval of time between end of opening movement and beginning of closing movement
• H04N 5/335 - Transforming light or analogous information into electric information using solid-state image sensors [SSIS]
• G06T 5/00 - Image enhancement or restoration

Abstract

Integrated chemical propellant and cold gas propulsion systems and methods are provided. A storage or fuel tank containing the chemical propellant is pressurized by a pressurant. The chemical propellant is selective passed to a propellant thruster through a first port of the storage tank and a propellant valve. The pressurant is selectively passed to a cold gas thruster through a second port of the storage tank and a cold gas valve. In addition, a pressurant tank can be provided. Pressurant contained within the pressurant tank can be selectively placed in communication with the pressurant contained within the storage tank via a pressurant valve, or can be selectively passed to the cold gas thruster through the cold gas thruster valve. Systems can also include bi-propellant thrusters, with a first and second chemical compounds and volumes of pressurant stored in first and second storage tanks respectively.

IPC Classes  ?

• F02K 9/50 - Feeding propellants using pressurised fluid to pressurize the propellants
• B64G 1/26 - Guiding or controlling apparatus, e.g. for attitude control using jets
• B64G 1/40 - Arrangements or adaptations of propulsion systems
• F02K 9/56 - Control
• F02K 9/88 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant thereforControl thereof characterised by thrust or thrust vector control using auxiliary rocket nozzles
• B64G 1/24 - Guiding or controlling apparatus, e.g. for attitude control
• F02K 9/44 - Feeding propellants

Abstract

Systems and methods for forming radio frequency beams in communication systems are provided. Signals from one or more devices are received at a base station and are processed using a vector based deep learning (VBDL) model or network. The VBDL model can receive and process vector and/or spatial information related to or part of the received signals. An optimal beamforming vector for a received signal is determined by the VBDL model, without reference to a codebook. The VBDL model can incorporate parameters that are pruned during training to provide efficient operation of the model.

IPC Classes  ?

• H04B 7/08 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
• G06N 3/08 - Learning methods
• G06N 3/04 - Architecture, e.g. interconnection topology

Abstract

Microwave radiometers (MRs) and methods for detecting microwave emissions using an electro-optical receiver that incorporates a photonic integrated circuit are provided. The electro-optical receiver includes an electro-optic modulator that modulates received radio frequency signals onto an optical carrier signal supplied by a pump laser. The resulting upconverted signal, containing the full spectrum of the radio frequency signals, is divided into channels by an optical filter. Each of the channels is connected to a corresponding photodetector, which produces an electrical output having an amplitude that is proportional to the amplitude of the received optical signal. The components included in the photonic integrated circuit can be formed on a single substrate. In addition, the optical filter can filter the received full spectrum optical signal into a large number of channels (e.g. greater than 50).

IPC Classes  ?

• G01R 33/00 - Arrangements or instruments for measuring magnetic variables
• G01K 11/00 - Measuring temperature based on physical or chemical changes not covered by group , , , or
• G01N 22/04 - Investigating moisture content

Abstract

Methods and systems for generating an estimate of a bit error rate of a signal are provided. Methods and systems include obtaining an eye mask for a receiver, receiving a signal with the receiver, generating an eye mask probability density function of the eye mask, generating an eye diagram probability density function based on the signal, calculating a product of the eye mask probability density function and the eye diagram probability density function, summing the product of the eye mask probability density function and the eye diagram probability density function, and estimating the bit error rate of the signal based on the summing of the product of the eye mask probability density function and the eye diagram probability density function.

IPC Classes  ?

• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector
• H04L 1/00 - Arrangements for detecting or preventing errors in the information received

Abstract

Heat transfer systems and methods are provided. The heat transfer system includes an evaporator section integrated with or thermally joined to a heat dissipating system. The evaporator section is connected to a condenser section by a conduit. Together, portions of the evaporator section, the condenser section, and the conduit form a closed volume containing a heat transfer fluid. A superhydrophobic surface is present on at least a portion of the condenser section forming a part of the closed volume. The superhydrophobic surface can include a plurality of carbon nanotubes. The carbon nanotubes can be provided as a forest of carbon nanotubes extending from a rough surface.

IPC Classes  ?

• B23P 15/26 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers
• F28D 15/04 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls in which the medium condenses and evaporates, e.g. heat-pipes with tubes having a capillary structure
• C23C 16/26 - Deposition of carbon only
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H01Q 1/02 - Arrangements for de-icingArrangements for drying-out

Abstract

Imaging systems and methods that implement a deep learning network are disclosed. The deep learning network utilizes pose information associated with at least some identified objects. The network is pruned, to reduce the amount of information processed and to optimize runtime processing when the network is deployed. In operation, the network identifies objects, and propagates pose information for at least some of the objects or components of identified objects. The network can be deployed as part of a processing system of an imaging system included as part of a remote platform.

IPC Classes  ?

• G06N 3/08 - Learning methods
• G06K 9/32 - Aligning or centering of the image pick-up or image-field
• G06K 9/62 - Methods or arrangements for recognition using electronic means
• G06F 9/30 - Arrangements for executing machine instructions, e.g. instruction decode
• G06F 9/38 - Concurrent instruction execution, e.g. pipeline or look ahead
• B64C 39/02 - Aircraft not otherwise provided for characterised by special use

Abstract

Systems and methods for configuring, packaging, and deploying spacecraft are provided. More particularly, spacecraft are configured with statically mounted instruments. An end of the spacecraft to which the instruments are mounted is relatively distant from a spacecraft bus, and has a narrow width relative to the spacecraft bus. During launch multiple overlapping and interleaved spacecraft are disposed radially about a longitudinal axis of the launch vehicle.

IPC Classes  ?

• B64G 1/64 - Systems for coupling or separating cosmonautic vehicles or parts thereof, e.g. docking arrangements
• B64G 1/10 - Artificial satellitesSystems of such satellitesInterplanetary vehicles
• B64G 1/44 - Arrangements or adaptations of power supply systems using radiation, e.g. deployable solar arrays
• B64G 1/00 - Cosmonautic vehicles

Abstract

Systems and method for determining an angle of arrival of a radio frequency (RF) signal are disclosed. A radio frequency receiving system as disclosed herein can include a plurality of antenna or receiving elements formed on a common plane. A spacing between the receiving elements can be arbitrary. In response to receiving a radio frequency signal, a difference in an integer number of wavelengths that have passed and a difference in a phase of the received signal is determined between each of a plurality of pairs of antenna elements. More particularly, a residual error is calculated for each possible difference in the number of integer wavelengths that can occur as the received signal travels to the elements in each pair of elements. A solution with a minimum residual value is taken as the difference in the actual integer number of wavelengths that have been traversed by the received signal. That integer value and the detected phase difference is applied to determine the angle of arrival.

IPC Classes  ?

• G01S 3/48 - Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured
• H01Q 3/24 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
• G01S 3/04 - Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves Details

Abstract

Antennas for radiating radio frequency energy that are integrated into a structure are provided. In particular, one or more nonconductive slots are formed in one or more convex layers or surfaces of a structure. Moreover, each nonconductive slot can be associated with one or more feeds. In at least some embodiments, the structure is an airfoil with a first convex surface joined to a second convex surface along an edge, and the at least one nonconductive slot extends from a point in the first surface or a layer of the structure including the first surface across the edge to a point in the second surface or a layer of the structure including the second surface.

IPC Classes  ?

• H01Q 13/18 - Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity
• H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons

Abstract

A multiple functional instrument is provided. The instrument includes an optical autocovariance function interferometer that can feature multiple fields of view to detect winds in the atmosphere. The instrument can include an infrared camera to detect atmospheric temperatures and the presence of clouds, and a detector assembly that detects the polarization of light returned to the interferometer. Data collected by the instrument can be provided to a deep and reinforcement learning algorithm for real-time prediction of clear air turbulence and other wind-based aviation safety phenomena. Moreover, predicted and actual conditions can be correlated and used to train a deep learning algorithm to enable more accurate predictions. The instrument can be carried by an aircraft or other platform and operated to detect clear air turbulence or other atmospheric phenomena, and to provide instructions regarding flight parameters including wind-aided navigation in order to minimize the effect of predicted turbulence.

IPC Classes  ?

• G01P 5/26 - Measuring speed of fluids, e.g. of air streamMeasuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave
• G01W 1/00 - Meteorology
• G01W 1/10 - Devices for predicting weather conditions
• G06N 3/08 - Learning methods
• G06N 20/00 - Machine learning
• G08G 5/00 - Traffic control systems for aircraft

Abstract

Methods and systems for processing a noisy time series input to detect a signal, generate a de-noising mask, and/or output a de-noised time series output are provided. The input is transformed into one or more datagrams, such as real and imaginary time-frequency grams. The datagrams are stacked and provided as first and second channel inputs to a neural network. A neural network is trained to detect signals within the input. Alternatively or in addition, the network is trained to generate a de-noise mask, and/or to output a de-noised time series output. Implementation of the method and systems can include the use of multiple deep neural networks (DNNs), such as convolutional neural networks (CNN's), that are provided with inputs in the form of RF spectrograms. Embodiments of the present disclosure can be applied to various RF devices, such as communication devices, including but not limited to multiple inputs multiple output (MIMO) devices and 5G communication system devices, and RADAR devices.

IPC Classes  ?

• H04B 1/12 - Neutralising, balancing, or compensation arrangements
• H04B 7/08 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
• G06F 17/14 - Fourier, Walsh or analogous domain transformations
• G06N 3/08 - Learning methods
• G06N 3/04 - Architecture, e.g. interconnection topology

Abstract

Cavity backed slot antenna systems and methods are provided. The systems include a frequency selective surface, a housing containing a cavity, and a feed structure between at least portions of the frequency selective surface and the cavity. The frequency selective surface can be embedded in a non-conductive slot in a first ground plane. The cavity can contain a space filler. Embodiments of the present disclosure provide an antenna with a relatively wide bandwidth and a relatively small antenna element.

IPC Classes  ?

• H01Q 15/02 - Refracting or diffracting devices, e.g. lens, prism
• H01Q 13/18 - Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity
• H01Q 5/50 - Feeding or matching arrangements for broad-band or multi-band operation
• H01Q 5/314 - Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors

Abstract

Transmitter tracking systems and methods are provided that utilize a phased array antenna. With the antenna forming a beam that is pointed in a first direction for a first frequency, a plurality of radio frequency (RF) signals, each associated with different carrier frequency and produced by a first transmitter, are received. The amplitudes of the received signals are used to determine whether the beam is pointed at the first transmitter. The amplitude information can also be used to determine a direction in which to point the beam if it is determined that the beam is not pointed at the first transmitter. The systems and methods can be applied to 5G, satellite communication, or other systems incorporating a phased array antenna.

IPC Classes  ?

• G01S 3/48 - Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured
• G01S 3/04 - Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves Details

Abstract

Antenna test systems and methods are disclosed. An antenna test system as disclosed herein can include an X-Y isolation structure that defines a plurality of unit cells, a plurality of coupling elements, with at least one coupling element within each unit cell, and a Z isolation structure. The size and general configuration of the unit cells are selected to allow the individual antenna elements of an array antenna to be placed within a unit cell. Each unit cell thus isolates an antenna element. The disclosed methods include passing energy between antenna elements and corresponding unit cells to characterize the performance of the antenna. An antenna test system as disclosed herein enables the costs associated with testing phased array antenna systems, including but not limited to antennas used in 5G communication systems, to be reduced as compared to prior techniques.

IPC Classes  ?

• H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture
• G01R 29/10 - Radiation diagrams of antennas

Abstract

Interconnectors, interconnector assemblies, and methods for supporting components are provided. An interconnector as disclosed connects a supported component to another component or assembly securely and accurately, even where the supported component and the other component have different expansion or contraction characteristics. The interconnector includes a plurality of support elements disposed in an array. Each support element includes a support surface at a free end of the support element. The areas of the support surfaces decrease with distance from a center of the array. In a completed assembly, the free ends of the support elements in the array are joined to the supported component.

IPC Classes  ?

• H01L 23/367 - Cooling facilitated by shape of device
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H01R 12/51 - Fixed connections for rigid printed circuits or like structures
• H01R 33/00 - Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holdersSeparate parts thereof

Abstract

Multiple mode star tracker methods and systems in which attitude information and image information is generated are provided. The multiple mode star tracker includes a detector having a plurality of pixels arranged in a focal plane array. The detector is operated to obtain multiple image frames from within a field of view containing a plurality of stars. For each of the image frames, the attitude of the detector and in turn the attitude of each pixel is determined. Based on the attitude quaternion of the individual pixels within a plurality of frames, image data from the plurality of frames is co-added or stacked to form a composite image. The co-addition of multiple frames of image data enables or facilitates the detection of dim objects by the multiple mode star tracker. Moreover, embodiments of the present disclosure enable the attitude quaternion for individual pixels within individual frames to be determined using the multiple mode star tracker function of the instrument, and without requiring attitude information provided by a separate device, such as a gyroscope.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
• G01S 5/16 - Position-fixing by co-ordinating two or more direction or position-line determinationsPosition-fixing by co-ordinating two or more distance determinations using electromagnetic waves other than radio waves
• G01C 21/02 - NavigationNavigational instruments not provided for in groups by astronomical means
• G01S 3/78 - Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using electromagnetic waves other than radio waves
• G01S 3/781 - Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using electromagnetic waves other than radio waves Details
• B64G 1/24 - Guiding or controlling apparatus, e.g. for attitude control

Abstract

Motor driver systems and methods with relatively low electromagnetic interference characteristics are provided. The system includes a motor or other capacitive load with single or multiple phases. Each phase of the motor is connected to a motor phase controller. Each motor phase controller includes a first voltage control loop, a second voltage control loop, and a current control loop. The first and second voltage control loops are nested within the current control loop. The voltage control loops can be configured to control a resonance peak in a frequency response of the motor, while the current control loop can be configured to control a notch in a frequency response of the motor.

IPC Classes  ?

• H02P 29/40 - Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
• H02M 1/12 - Arrangements for reducing harmonics from AC input or output
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• H02P 21/22 - Current control, e.g. using a current control loop
• H02P 8/12 - Control or stabilisation of current
• H02P 6/08 - Arrangements for controlling the speed or torque of a single motor
• H02P 6/34 - Modelling or simulation for control purposes
• H02P 25/22 - Multiple windingsWindings for more than three phases

Abstract

Phase correction systems and methods capable of operating in a deployed antenna system are provided. The phase correction system includes a signal generator and a signal coupler. The signal coupler injects a signal at an end of a signal line adjacent an antenna element. Changes in an effective length of the signal line can be detected at a controller that monitors characteristics of the injected signal after it has passed through the signal line. The system can adapt to detected changes in the electrical length by controlling an adjustable phase shifter provided in line with the signal line or by applying suitable post-processing.

IPC Classes  ?

• H04B 17/12 - MonitoringTesting of transmitters for calibration of transmit antennas, e.g. of amplitude or phase
• H04B 17/391 - Modelling the propagation channel
• H04B 17/24 - MonitoringTesting of receivers with feedback of measurements to the transmitter
• H04B 17/14 - MonitoringTesting of transmitters for calibration of the whole transmission and reception path, e.g. self-test loop-back

Abstract

Flexural pivot structures and methods are provided. A flexural pivot as disclosed allows for rotation of a pivoted member relative to a base member about a central axis, while inhibiting or preventing movement of the pivoted member relative to the base member in any other direction. Base and pivoted sections of the flexural pivot structure are connected to one another by a set of resilient blades or flexural members. A thickness of the blades varies with the distance from the central axis. The components of the flexural pivot can comprise a monolithic structure that is formed from a single piece of material.

IPC Classes  ?

• F16C 11/12 - Pivotal connections incorporating flexible connections, e.g. leaf springs
• F16F 1/16 - Attachments or mountings

Abstract

A micropositioner is provided. The micropositioner can include a suspension system with a support element that is connected to a base by first and second sets of flexures. The first and second sets of flexures permit movement of the support element within first and second dimensions respectively, while preventing movement of the support element in a third dimension that is orthogonal to the first and second dimensions. More particularly, the first set of flexures can include first and second flexures that are opposite one another and configured such that movement of the support element in the first dimension is allowed, but movement of the support element in the second and third dimensions is prevented. The second set of flexures can include third and fourth flexures that are opposite to one another and configured such that movement of the support element in the second dimension is allowed, but movement in the first and third dimensions is prevented. The micropositioner may be included in a system for pointing a laser beam.

IPC Classes  ?

• G02B 6/36 - Mechanical coupling means

Abstract

An interferometer is provided. The interferometer includes a multifaceted beamsplitter. Angles of incidence between beams entering the beamsplitter and a beamsplitting surface of the beamsplitter are less than 45 degrees. The arms of the interferometer feature a refractive compensator or a catseye optical configuration to provide an optical path length difference for rays that is the same at any location along the effective aperture of the interferometer. A detector assembly can be included with at least four detectors that lie in a plane and that receive light along paths that are orthogonal to that plane.

IPC Classes  ?

• G01B 9/02 - Interferometers
• G01S 17/95 - Lidar systems, specially adapted for specific applications for meteorological use

Abstract

Systems and methods for isolating radio frequency (RF) signals in high frequency circuit assemblies, including but not limited to 5G communication systems, are provided. The circuit assemblies include an RF suppression structure, which can be in the form of a low ohm resistor, that extends across a transmission line, and that has contacts that are electrically joined to a ground plane. Alternatively or in addition, the circuit assemblies include a low ohm resistor that extends over a transition between a signal via and an end of a transmission line, and that has contacts that are electrically joined to a ground plane. A circuit assembly as disclosed herein can further include multiple low ohm resistors spaced apart from one another by a distance that is a fraction of a wavelength of a highest frequency signal carried by the transmission line.

IPC Classes  ?

• H04B 3/32 - Reducing cross-talk, e.g. by compensating
• H04B 1/10 - Means associated with receiver for limiting or suppressing noise or interference
• H04B 1/12 - Neutralising, balancing, or compensation arrangements
• H04B 1/711 - Interference-related aspects the interference being multi-path interference
• H04B 3/30 - Reducing interference caused by unbalanced currents in a normally balanced line

Abstract

An antenna system circuit board stack with feed vias and with non-feed vias is disclosed. An antenna system circuit board stack as disclosed herein can include a plurality of patches or radiating elements formed on a common plane comprising a first surface of a circuit board. Each radiating element is electrically connected to one or more feed vias. In addition non-feed vias extend through, but are electrically isolated from, the radiating elements. An antenna system as disclosed herein enables the costs associated with multiple beam antenna systems, including but not limited to 5G communication systems, to be reduced as compared to alternative techniques.

IPC Classes  ?

• H01Q 9/04 - Resonant antennas
• H05K 1/02 - Printed circuits Details
• H05K 1/11 - Printed elements for providing electric connections to or between printed circuits
• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
• H01Q 21/00 - Antenna arrays or systems
• H01Q 1/52 - Means for reducing coupling between antennas Means for reducing coupling between an antenna and another structure

Abstract

Methods and systems for remotely detecting gases and emissions of gases are provided. Data is collected from a scene using a sensor system. The data is initially optionally processed as 1D data to remove noise, and is then assigned a confidence value by processing the 1D data using a neural network. The confidence value is related to a likelihood that an emission has been detected at a particular location. The processed 1D data, including the confidence value, is gridded into 2D space. The 2D data is then processed using a neural network to assign a 2D confidence value. The 2D data can be fused with RGB data to produce a map of emission source locations. The data identifying emissions can also be processed using a neural network to determine and output emission rate data.

IPC Classes  ?

• G01N 21/39 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
• G01M 3/38 - Investigating fluid tightness of structures by using light
• G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
• G01M 3/22 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables, or tubesInvestigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipe joints or sealsInvestigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for valves

Abstract

Interconnection systems and methods are provided. An interconnector as disclosed allows for a first component having a first coefficient of thermal expansion to be joined to a second component having a second coefficient of thermal expansion securely, and while maintaining a precise alignment between the components. The interconnector generally includes a plurality of pins that each have a free end that is adhered to the first component for imaging, sensing, tracking, processing, and other applications.

IPC Classes  ?

• H01L 23/367 - Cooling facilitated by shape of device
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• F16B 1/00 - Devices for securing together, or preventing relative movement between, constructional elements or machine parts
• F16B 5/00 - Joining sheets or plates to one another or to strips or bars parallel to them
• H01R 12/57 - Fixed connections for rigid printed circuits or like structures characterised by the terminals surface mounting terminals
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• H05K 3/32 - Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits

Abstract

A calibration system for sensors is provided. The calibration system includes an array of blackbody elements. Each blackbody element includes a high emissivity surface. The high emissivity surface can be formed using carbon nanotubes. In addition, each blackbody element includes a heating element and a temperature sensor. The heating element is operated to bring the blackbody element to a set point temperature, as determined by the temperature sensor. As an example, the calibration system can be used in connection with sensors sensitive to infrared wavelengths that is carried by a satellite or other platform.

IPC Classes  ?

• G01J 5/52 - Radiation pyrometry, e.g. infrared or optical thermometry using comparison with reference sources, e.g. disappearing-filament pyrometer
• G01J 5/08 - Optical arrangements
• G01J 5/10 - Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
• G01J 5/00 - Radiation pyrometry, e.g. infrared or optical thermometry

Abstract

Lidar systems and methods are provided. The lidar system includes a laser that outputs light at two different wavelengths and an interferometer that is capable of generating fringe patterns for each of the two wavelengths simultaneously. More particularly, a first arm of the interferometer provides first and second path lengths. Light of a first of two or more wavelengths traverses the first path length within the first arm, while light of a second one of the two wavelengths traverses the second path length within the first arm. A second arm of the interferometer provides a third path length. Light from the first and second arms is then combined, and a phase shift of light of the first wavelength and a phase shift of light of the second wavelength are determined.

IPC Classes  ?

• G01S 17/95 - Lidar systems, specially adapted for specific applications for meteorological use
• G01S 7/486 - Receivers

Abstract

Phased array antenna systems are disclosed. An antenna system as disclosed herein can include a plurality of antenna or radiating elements formed on a common plane comprising a first surface of a circuit board. Each antenna element has one or more feeds. Integrated circuits are placed on a second surface of the circuit board. Each integrated circuit is associated with one or more of the antenna elements. Signal lines connecting an integrated circuit to a feed of an antenna element can be shielded using interlayer ground planes and interlayer conductive plugs. In addition, back surfaces of the integrated circuits can be connected to a common heatsink using a thermally conductive medium.

IPC Classes  ?

• H01Q 3/34 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means
• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
• H01L 23/367 - Cooling facilitated by shape of device
• H01Q 1/02 - Arrangements for de-icingArrangements for drying-out
• H01Q 21/00 - Antenna arrays or systems
• H05K 1/02 - Printed circuits Details
• H05K 1/11 - Printed elements for providing electric connections to or between printed circuits
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H01Q 9/04 - Resonant antennas
• H01L 23/42 - Fillings or auxiliary members in containers selected or arranged to facilitate heating or cooling

Abstract

Methods and systems for locating a target radio frequency (RF) device within an area are provided. In particular, a signal sent from a known transmitter while that transmitter is at a known location is received by a plurality of receivers located in or around the area. This is repeated multiple times for multiple locations. Representations of the signals received at the receivers for the different locations are provided as inputs to a neural network and are used to train the network. After training, representations of signals received at the receivers as a result of one or more signals emitted from a target transmitter located in or traveling through the area can be provided to the network, which in response provides a location of the target transmitter.

IPC Classes  ?

• G06N 20/00 - Machine learning
• H04W 4/029 - Location-based management or tracking services

Abstract

Wide band adaptive beam forming methods and systems are provided. The beam forming methods can include receiving signals at multiple antenna elements and digitizing samples of the received signals for some period of time. The samples are divided into sub-channels according to frequency, and interferers are identified as signals appearing across at least some minimum number of the sub-channels. After removing signals not identified as interferers from the collected signal information, that information is used to calculate weights for forming a beam having a null at the identified location of the interferer. The beam forming systems include multiple element antennas having arms in the form of a spiral, and processing hardware for performing adaptive beam forming.

IPC Classes  ?

• G01S 3/28 - Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics
• H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture
• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
• G01S 7/28 - Details of pulse systems
• G01S 19/21 - Interference related issues

Abstract

Methods and systems for identifying occupied areas of a radio frequency (RF) spectrum, identifying areas within that RF spectrum that are unusable for further transmissions, and identifying areas within that RF spectrum that are occupied but that may nonetheless be available for additional RF transmissions are provided. Implementation of the method then systems can include the use of multiple deep neural networks (DNNs), such as convolutional neural networks (CNN's), that are provided with inputs in the form of RF spectrograms. Embodiments of the present disclosure can be applied to cognitive radios or other configurable communication devices, including but not limited to multiple inputs multiple output (MIMO) devices and 5G communication system devices.

IPC Classes  ?

• H04W 16/10 - Dynamic resource partitioning
• H04B 7/0413 - MIMO systems
• G06N 3/06 - Physical realisation, i.e. hardware implementation of neural networks, neurons or parts of neurons
• G06N 3/04 - Architecture, e.g. interconnection topology
• G06N 3/08 - Learning methods
• H04W 16/14 - Spectrum sharing arrangements
• H04W 24/02 - Arrangements for optimising operational condition

Abstract

Free-space communication systems and methods are provided. The systems include a transmitter that combines multiple sets of radio-frequency-modulated optical carrier frequencies for transmission across free space using multiple transmission apertures. Different sets of signals are filtered to form single sideband signals. The different sets of single sideband signals are then combined to form dense wavelength division multiplexed signals. In addition, combined sets of signals of different polarizations can be combined. A receiver can include a single receive aperture.

IPC Classes  ?

• H04J 14/00 - Optical multiplex systems
• H04J 14/02 - Wavelength-division multiplex systems
• H04J 14/06 - Polarisation multiplex systems
• H04B 10/112 - Line-of-sight transmission over an extended range
• H04B 10/118 - Arrangements specific to free-space transmission, i.e. transmission through air or vacuum specially adapted for satellite communication

Abstract

Suspension system structures and methods are provided. A system as disclosed allows for rotation of a supported object in two axes, with very little translational movement of the supported object. The system can include a base mounting structure that is joined to an intermediate or connecting structure by a first set of flexure blades. The connecting structure is in turn joined to a supported element structure by a second set of flexure blades. The first set of flexure blades can include four blades that intersect along a line that is coincident with an X axis of rotation, and the second set of flexure blades can include four blades that intersect along a line that is coincident with the Y axis of rotation. The components of the suspension system can comprise a monolithic structure that is formed from a single piece of material.

IPC Classes  ?

• F16M 11/10 - Means for attachment of apparatusMeans allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
• G02B 26/10 - Scanning systems
• A47G 1/24 - Appliances for adjusting pictures, mirrors, or the like, into a desired position, especially inclined
• A47G 1/02 - Mirrors used as equipment
• G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
• F16F 15/04 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using elastic means
• F16M 11/20 - Undercarriages with or without wheels
• G02B 7/182 - Mountings, adjusting means, or light-tight connections, for optical elements for prismsMountings, adjusting means, or light-tight connections, for optical elements for mirrors for mirrors

Abstract

A multilayer insulation is provided. The multilayer insulation includes a plurality of layers of material separated from one another by post elements. The interior of the integrated multilayer insulation can be filled with a selected gas. Moreover, the gas can be held in an interior volume of the integrated multilayer insulation at a pressure greater than ambient pressure, or flowed through the interior volume of the integrated multilayer insulation. The integrated multilayer insulation can be placed directly over an object to be insulated, or over a cellular insulation structure that is placed directly on the object to be insulated.

IPC Classes  ?

• F16L 59/06 - Arrangements using an air layer or vacuum
• B65D 81/38 - Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
• F16L 59/07 - Arrangements using an air layer or vacuum the air layer being enclosed by one or more layers of insulation
• F16L 59/065 - Arrangements using an air layer or vacuum using vacuum

Abstract

Control systems and methods for facilitating human control of complex systems, including complex mechanical systems, are provided. The control system can include one or more user input devices adapted to receive user inputs in various forms. Electronic signals generated by the user input devices in response to the user inputs are provided to a controller, which processes the signals, validates and prioritizes those signals, and generates appropriate control signals. The control signals are then provided to the controlled system. User feedback regarding the operation of the control system, the controlled system, an operating environment, or the like, can be delivered to the user through the control system.

IPC Classes  ?

• A01B 69/00 - Steering of agricultural machines or implementsGuiding agricultural machines or implements on a desired track
• B62D 6/00 - Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
• B62D 11/00 - Steering non-deflectable wheelsSteering endless tracks or the like
• B62D 12/00 - Steering specially adapted for vehicles operating in tandem or having pivotally connected frames
• B63G 8/20 - Steering equipment
• B63H 25/04 - Initiating means for steering automatic, e.g. reacting to compass
• G05D 1/00 - Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
• G06F 7/00 - Methods or arrangements for processing data by operating upon the order or content of the data handled
• G06F 17/00 - Digital computing or data processing equipment or methods, specially adapted for specific functions
• G06F 19/00 - Digital computing or data processing equipment or methods, specially adapted for specific applications (specially adapted for specific functions G06F 17/00;data processing systems or methods specially adapted for administrative, commercial, financial, managerial, supervisory or forecasting purposes G06Q;healthcare informatics G16H)
• B60W 10/00 - Conjoint control of vehicle sub-units of different type or different function
• B60W 10/18 - Conjoint control of vehicle sub-units of different type or different function including control of braking systems
• B60W 10/20 - Conjoint control of vehicle sub-units of different type or different function including control of steering systems

Abstract

An antenna with tightly coupled elements is provided. The antenna includes a plurality of planar elements. Each element is connected to a signal line, and is coupled to at least one other element. The elements are arranged in one or more linear arrays. A first array of elements can be provided on a first plane, while a second array of elements can be provided on a second plane. Moreover, elements included in the first array can can at least partially overlap elements included in the second array. Alternatively, a single array of elements formed on a first plane can be provided, with coupling elements that are capacitively connected to one element, and directly, are electrically connected to an adjacent element.

IPC Classes  ?

• H01Q 21/08 - Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along, or adjacent to, a rectilinear path
• H01Q 1/50 - Structural association of antennas with earthing switches, lead-in devices or lightning protectors
• H01Q 21/00 - Antenna arrays or systems

Abstract

Control systems and methods are provided. The systems and methods include a field programmable gate array (FPGA) in which a plurality of functional processing units (FPUs) are formed, and one or memories having a plurality of memory locations. An input signal is received from a sensor and is processed in at least some of the FPUs. The FPUs can be reused one or more times during the processing of a single input signal. The system can also receive a control signal as an additional input. In response to the inputs, an output signal is generated. The output signal can be used to control an actuator. In accordance with further embodiments, the operation of the FPUs can be reconfigured by storing different operating parameter values in memory.

IPC Classes  ?

• G06F 12/00 - Accessing, addressing or allocating within memory systems or architectures
• G06F 13/00 - Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
• G06F 13/28 - Handling requests for interconnection or transfer for access to input/output bus using burst mode transfer, e.g. direct memory access, cycle steal
• G06F 3/06 - Digital input from, or digital output to, record carriers

Abstract

Antenna systems and methods providing dual polarization are provided. The system includes one or more antenna elements, with each antenna element having feed points on adjacent sides. A first of the feed points is associated with a first one of a transmitted or received signal, while a second one of the feed points is associated with a second one of a transmitted or received signal. The sides of the rectangular driven element can feature different lengths, to provide transmit and receive bands that are separated from one another in frequency. A polarizer is disposed between the antenna elements and free space. Linearly polarized signals from the antenna elements are transformed into circularly polarized signals by the polarizer. Circularly polarized signals received at the antenna system are transformed into linearly polarized signals before they are passed to the antenna elements. An antenna system as disclosed herein can include a plurality of antenna elements arranged in an array.

IPC Classes  ?

• H01Q 19/00 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
• H01Q 25/00 - Antennas or antenna systems providing at least two radiating patterns
• H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction

Abstract

Methods and systems for heating a space deployed membrane assembly are provided. The membrane assembly can include one or more framed sections. Each section can include a composite membrane having a membrane substrate and a transparent, electrically conductive resistive coating. The composite membrane is held within a frame. Electrically conductive bus bars are provided and are placed in intimate electrical contact with the resistive coating. The electrically conductive bus bars are generally arranged, on opposite sides of the perimeter of the membrane. A controller passes current between selected bus bars, with different bus bars operative to pass current between them at different times. The magnitude of the voltage applied to the bus bars, the location of the bus bars, the operational sequence of powering the bus bars, and the time over which current is passed between a selected pair of bus bars, are selected to provide substantially uniform time averaged heating of the membrane.

IPC Classes  ?

• H05B 1/02 - Automatic switching arrangements specially adapted to heating apparatus
• G02B 7/00 - Mountings, adjusting means, or light-tight connections, for optical elements
• H05B 3/84 - Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
• H05B 3/22 - Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
• G02B 5/18 - Diffracting gratings

Abstract

Embodiments of the present disclosure include an actuator for steering mirrors with low magnetic hysteresis losses at high frequencies, with a fast step response, and without excessive heating of the steering mirror. Various embodiments of the actuator include two stators (a left stator and a right stator or an inner stator and an outer stator) and a rotor positioned between the stators. Each stator has a core assembly with one or more cores, two or more legs, and two or more faces positioned proximate to the rotor. The two or more legs are separated from one another by portions of the one or more coils. The rotor includes a core and a plurality of magnets, where each magnet has a face positioned proximate to the faces of one core assembly.

IPC Classes  ?

• G02B 7/182 - Mountings, adjusting means, or light-tight connections, for optical elements for prismsMountings, adjusting means, or light-tight connections, for optical elements for mirrors for mirrors
• G02B 26/10 - Scanning systems
• H02K 1/14 - Stator cores with salient poles
• G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
• H02K 16/04 - Machines with one rotor and two stators
• H02K 41/035 - DC motorsUnipolar motors

Abstract

A deployable structure having a plurality of panel elements is provided. Adjacent panel elements are connected to one another by hinges. The hinges allow the panel elements to be placed in a stowed or folded configuration, in which adjacent pairs of panel elements are folded against one another to provide a relatively compact assembly. Biasing members can be provided to transition the deployable structure from the stowed configuration to a deployed configuration. When in the deployed configuration, the relative positions of the panel elements of the deployable structure are maintained, at least in part, by locating interface assemblies. The deployable structure may have a generally annular configuration when deployed.

IPC Classes  ?

• G02B 23/20 - Collapsible housings
• G02B 27/42 - Diffraction optics
• G02B 5/18 - Diffracting gratings

Abstract

Methods and systems for passively slowing the spin rate of an uncontrolled object in space are presented. A damper mechanism is provided that includes a magnet that is free to rotate in any direction about a central point with respect to a carrier or outer housing. The magnet can be carried within an inner element or sphere, that is in turn mounted within an outer sphere. The inner and outer spheres can be separated by a viscous fluid or other mechanism in which damping can be introduced. The damper mechanism can be associated with an attachment mechanism, that secures the resulting damper or despin system to a target object. A method of neutralizing the magnetic field is also included to enable the system to be launched in a passive state.

IPC Classes  ?

• B64G 1/24 - Guiding or controlling apparatus, e.g. for attitude control
• B64G 1/32 - Guiding or controlling apparatus, e.g. for attitude control using earth's magnetic field
• B64G 1/38 - Guiding or controlling apparatus, e.g. for attitude control damping of oscillations, e.g. nutation dampers

Abstract

Methods and systems for providing a high speed scanner tracker are disclosed. The scanner tracker can include a mirror assembly that rotates within a housing about a first axis. Moreover, the mirror can be tilted about a second axis. Pulses of light can be directed to and received from a selected location or target surface located within a target volume by selectively controlling the rotational and tilt angles of the mirror relative to a laser associated with the scanner tracker assembly.

IPC Classes  ?

• G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
• G02B 26/10 - Scanning systems

Abstract

A system for remotely detecting gas concentration is provided. The system includes a plurality of light sources. At least a first one of the light sources generates light having a first wavelength and a first polarization, and at least a second one of the light sources generates light having a second, different wavelength and a second polarization that is orthogonal to the first polarization. The light from the light sources is placed on a common transmission path, and is directed to a target area by a steering mirror. Light reflected from the target area is received and directed to a detector. The detector provides information regarding the time of arrival and amplitude of the received light, allowing range and gas concentration information to be obtained. In some embodiments the detector is an imaging detector, allowing three-dimensional range information to be obtained from the target area from a single light pulse.

IPC Classes  ?

• G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
• G01J 3/02 - SpectrometrySpectrophotometryMonochromatorsMeasuring colours Details
• G01N 21/25 - ColourSpectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
• G01S 7/481 - Constructional features, e.g. arrangements of optical elements
• G01S 17/02 - Systems using the reflection of electromagnetic waves other than radio waves
• G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
• G01J 3/10 - Arrangements of light sources specially adapted for spectrometry or colorimetry
• G01J 3/28 - Investigating the spectrum
• G01J 3/42 - Absorption spectrometryDouble-beam spectrometryFlicker spectrometryReflection spectrometry
• G01S 7/497 - Means for monitoring or calibrating
• G01S 7/499 - Details of systems according to groups , , of systems according to group using polarisation effects

Abstract

Methods and systems for thinning the output of an array antenna are disclosed. The thinning can be applied in response to determining that the performance of a multiple element antenna array with respect to a desired signal has been compromised by the presence of one or more interfering signals. The application of a thinning pattern has the effect of turning off selected antenna elements within the array. The effect of applying a particular thinning pattern on the realized performance of the antenna system can be determined. An alternate thinning pattern can be applied if the previous thinning pattern did not result in an improvement, or a sufficient improvement, in the performance of the antenna system.

IPC Classes  ?

• G01S 3/16 - Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic
• G01S 7/28 - Details of pulse systems
• H01Q 21/22 - Antenna units of the array energised non-uniformly in amplitude or phase, e.g. tapered array or binomial array
• H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture

Abstract

Methods and systems for correcting chromatic aberrations in a telescope incorporating a diffractive primary optical element are provided. In particular, a corrective optic assembly that includes a corrector diffractive optical element (DOE) is described. The corrective optic assembly provides light to the corrector DOE at a high incidence angle. Moreover, light is reflected from the corrector DOE at a high exit angle comprising a cylindrical Littrow configuration allowing for greater bandwidth and smaller size.

IPC Classes  ?

• G02B 23/06 - Telescopes, e.g. binocularsPeriscopesInstruments for viewing the inside of hollow bodiesViewfindersOptical aiming or sighting devices involving prisms or mirrors having a focusing action, e.g. parabolic mirror
• G02B 27/42 - Diffraction optics
• G02B 17/08 - Catadioptric systems

Abstract

Systems and methods for providing a hybrid integrated nanostructure and nanotube substrate system are disclosed. The system includes a substrate having a plurality of nanostructures formed thereon. Interconnected to the substrate, directly or through nanostructures, are nanotubes. The nanostructures can extend for a greater distance from the surface of the substrate than the nanotubes, providing a robust structure. In addition, the structure can be highly emissive and absorptive hybrid surface.

IPC Classes  ?

• H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions

Abstract

A continuous horn or flared radiator antenna system is provided. The antenna system provides for steering a beam within at least a first plane (e.g., in azimuth). Steering a beam includes selecting an operative portion or segment of a circular array of elements or probe feeds. Steering can also include electronically steering the resulting beam within a coverage area provided by the selected segment of probe feeds. The electronic steering within the coverage area can be performed through the selective operation of phase shifters. Multiple continuous horn radiator structures can be provided to support pointing or steering of a beam in a second plane (e.g., in elevation), operation in multiple frequency bands, and/or simultaneous transmission and reception of signals.

IPC Classes  ?

• H01Q 3/24 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
• H01Q 3/36 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with variable phase-shifters
• H01Q 21/00 - Antenna arrays or systems
• H01Q 21/29 - Combinations of different interacting antenna units for giving a desired directional characteristic
• H01Q 23/00 - Antennas with active circuits or circuit elements integrated within them or attached to them

Abstract

Conformal antennas and methods for radiating radio frequency energy using conformal antennas are provided. In particular, one or more tapered feeds can be provided as part of or interconnected to a conductive top plate. The one or more tapered feeds have a depth that decreases from a feed point to a tip. The tip of the one or more tapered feeds is adjacent a cavity formed over a lens region. An aperture over the lens region can be covered or filled by an impedance surface. This impedance surface may comprise a frequency selective surface. Alternatively, a frequency selective surface can be provided over the lens region of an antenna incorporating one or more stripline feeds.

IPC Classes  ?

• H01Q 1/42 - Housings not intimately mechanically associated with radiating elements, e.g. radome
• H01Q 19/06 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens

Abstract

Embodiments of the present disclosure include an actuator for steering mirrors with low magnetic hysteresis losses at high frequencies, with a fast step response, and without excessive heating of the steering mirror. Various embodiments of the actuator include two stators (a left stator and a right stator or an inner stator and an outer stator) and a rotor positioned between the stators. Each stator has a core assembly with one or more cores, two or more legs, and two or more faces positioned proximate to the rotor. The two or more legs are separated from one another by portions of the one or more coils. The rotor includes a core and a plurality of magnets, where each magnet has a face positioned proximate to the faces of one core assembly.

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 33/12 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moving in alternate directions by alternate energisation of two coil systems
• G02B 7/182 - Mountings, adjusting means, or light-tight connections, for optical elements for prismsMountings, adjusting means, or light-tight connections, for optical elements for mirrors for mirrors
• H02K 41/035 - DC motorsUnipolar motors
• H01F 3/02 - Cores, yokes or armatures made from sheets

Goods & Services

Custom manufacturing and construction of space-related systems, namely, satellites and spacecraft, space-based instruments and sensors for monitoring interplanetary environments, gathering global intelligence, and obtaining data for scientific and research purposes, payloads, buses, antennas and microwave systems; custom manufacture of space-related systems, namely, satellites and spacecraft, space-based instruments and sensors for monitoring interplanetary environments, gathering global intelligence, and obtaining data for scientific and research purposes, payloads, buses, antennas and microwave systems; prototyping of ground, airborne and space systems for others; manufacturing of cyber secure communication and information networks for others Engineering; engineering design services; consulting in the field of engineering; engineering services, namely, system design and software development for ground, airborne and space systems; consultation and research in the field of aerospace engineering; technology consultation and research in the field of aerospace; custom design and engineering of satellites and spacecraft, and space-based instruments, cameras, sensors for monitoring interplanetary environments, gathering global intelligence, and obtaining data for scientific and research purposes, optics, steering mirrors, star trackers, lidars, payloads, buses, antennas and microwave systems; custom design and engineering of components and subsystems for satellites; custom design and engineering of instruments for exploring outer space, namely, space-based instruments for monitoring interplanetary environments, gathering global intelligence, and obtaining data for scientific and research purposes; research, development, engineering and testing services in the field of aerospace engineering; data automation and collection service using proprietary software to evaluate, analyze and collect service data; collection, evaluation and analysis of measurement and signature intelligence data using proprietary software to evaluate, analyze and collect service data; collection, evaluation and analysis of geospatial intelligence data using proprietary software to evaluate, analyze and collect service data; research and development and consultation related thereto in the field of measurement and signature intelligence data and geospatial intelligence data; computer services in the field of geospatial and measurement and signature intelligence information systems, namely, developing and using software to monitor, test, analyze, and report geospatial intelligence data and measurement data; computer modeling services and computer simulation services based on computer programs, using measurement and signature intelligence data and geospatial intelligence data, for others; computer services, namely, development of spatially-based software, algorithms, workstations and related spatially-based support systems and databases; research and analysis services in the field of remote sensing phenomenology; providing information in the field of remote sensing phenomenology; consulting in the field of and application of remote sensing data, satellite imagery, measurement and signature intelligence data and geospatial intelligence data; consulting in the use and application of geospatial information systems and technologies; development, design and integration of cyber secure communication and information networks; design, development and computer systems and network integration of satellite operations and ground centers with satellite equipment; engineering services related to integration of computer and communications systems for cyber secure network environments; design, and integration of computer network technology and cyber security technology; development of cyber security systems and contingency planning for information systems breaches; computer systems analysis in the nature of cyber defense analytics; research and development of technology in the field of cyber security and cyber defense

Abstract

Embodiments of the disclosed invention relate to providing cooling to instruments or other components. More particularly, hydrogen from a store is provided to pre-cool helium contained within a closed loop refrigeration circuit. Helium pre-cooled by the hydrogen, for example after expansion of the hydrogen in an expansion valve, is itself passed through an expansion valve, and applied to a heat load. The helium can be circulated through the refrigeration circuit using a compressor. The hydrogen used for pre-cooling the helium can be from a store of hydrogen that also provides fuel to a hydrogen consumer, for example for propulsion of a vehicle carrying the cooling system or for the production of electrical power. A hydrogen consumer can also be provided with hydrogen that has first been used to pre-cool the helium refrigeration circuit.

IPC Classes  ?

• F25B 7/00 - Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
• F25B 9/00 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point

Abstract

A dual polarized array antenna is disclosed. The array antenna includes a plurality of electrically conductive elements or posts, arranged in rows and columns. Multiple parallel slots are formed that intersect different rows and columns of electrically conductive elements. The slots receive feed elements that include a linear array of feed points. The feed points within each linear array alternate between a feed point associated with a first polarization and a feed point associated with a second polarization.

IPC Classes  ?

• H01Q 21/00 - Antenna arrays or systems
• H01Q 13/10 - Resonant slot antennas
• H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction

Abstract

LIDAR systems and methods are provided. More particularly, a distributed focal plane assembly is provided in which light collected by optical fibers is delivered to detectors on a separate substrate. Moreover, signals from detectors can be stored in analog memory on a different substrate from the detectors. Alternatively, light may be imaged onto detectors on one substrate and stored in analog memory on a different substrate. The detectors can be provided in a linear or one-dimensional array. A laser source can comprise a multiplexed laser source which provides a sequence of pulses separated in time and having different directions of propagation.

IPC Classes  ?

• G01C 3/08 - Use of electric radiation detectors
• G01S 7/486 - Receivers

Abstract

Embodiments of the disclosed invention relate to identifying safe landing sites on a surface. More particularly, three-dimensional image data is obtained from a surface. That image data is processed using morphological operations to create a smoothed surface. The smoothed surface data is then used to calculate slopes, to identify areas of the surface that present a slope hazard. The smooth data obtained for identifying slope hazards can also be used in connection with identifying surface features, including bumps or holes, that create surface feature hazards. After identifying the slope and/or surface feature hazards, a hazard map indicating safe and not safe landing areas can be created.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints

Abstract

Conformal antennas and methods for radiating radio frequency energy using conformal antennas are provided. In particular, one or more tapered feeds can be provided as part of or interconnected to a conductive top plate. The one or more tapered feeds have a depth that decreases from a feed point to a tip. The tip of the one or more tapered feeds is adjacent a cavity formed over a lens region. An aperture over the lens region can be covered or filled by an impedance surface. This impedance surface may comprise a frequency selective surface. Alternatively, a frequency selective surface can be provided over the lens region of an antenna incorporating one or more stripline feeds.

IPC Classes  ?

• H01Q 19/06 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
• H01Q 13/00 - Waveguide horns or mouths Slot antennas Leaky-waveguide antennas Equivalent structures causing radiation along the transmission path of a guided wave
• H01Q 1/42 - Housings not intimately mechanically associated with radiating elements, e.g. radome

Abstract

A frozen surface technology is provided that can be used to provide a precisely defined surface. The frozen surface technology can include the use of a frozen membrane. For instance, frozen membrane mirrors and methods of producing frozen membrane mirrors are provided. The frozen membrane mirror includes a membrane material having a reflective surface. Active control is used to maintain a desired figure of the reflective surface while a solidifying material is applied to a back side of the membrane material. Active control of the figure of the reflective surface is maintained while the solidifying material cures. Once the solidifying material has been applied and cured, active control can be removed. The frozen surface technology also enables the formation of a surface with a precisely defined shape from a shell material that is brought into a flexible state, is actively controlled to achieve the desired surface shape, and that continues to be actively controlled until the shell material has been brought into a fixed or frozen state.

IPC Classes  ?

• G02B 7/188 - Membrane mirrors

Abstract

A dual-polarized antenna array is disclosed. The antenna array includes a plurality of self supporting, electrically conductive members. Tapered elements of neighboring electrically conductive members define tapered slots that form part of radiating structures. The radiating structures additionally include a slot line in communication with the tapered slot. A back cavity can be included as part of a BALUN structure that is integral to an electrically conductive member.

IPC Classes  ?

• H01Q 13/10 - Resonant slot antennas

Abstract

An antenna system that includes one or more radiator packages on a first side of an antenna substrate and one or more support packages on a second side of the antenna substrate are provided. Embodiments of the present invention include antenna systems incorporating a plurality of radiator packages on a first side of the antenna substrate and a plurality of support packages on the second side of the antenna substrate. The radiator packages generally include a radiator element and an integrated circuit that are incorporated into a common package. The integrated circuit of the radiator package can comprise an amplifier and/or other electronic components. The support packages generally provide one or more additional electronic components. For example, a support package integrated circuit can provide a phase shifter, amplifier, and/or other electronic components. The antenna substrate generally incorporates electrical conductors for operatively interconnecting each radiator package to at least one support package.

IPC Classes  ?

• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support

Abstract

The present invention relates to a temporal depolarization assembly. The depolarization assembly operates to produce light that, over some period of time, is depolarized. The depolarization assembly includes first and second variable retarders. The variable retarders are operated to produce a retardance that varies in time. In addition, the modulator axis of a first one of the variable retarders is held at an angle to the modulator axis of the second one of the variable retarders. The frequency at which the retardance of the variable retarders varies is selected to be some fraction of the integration time of a sensor associated with the polarization assembly.

IPC Classes  ?

• G02B 5/30 - Polarising elements

Abstract

Field widening lens methods and systems are provided. The field widening lens includes a non-planar primary mirror and a secondary mirror. In addition, separate input and output ports are provided. The field widening lens further provides for an optical path difference for rays within the lens that is essentially zero for any ray within the field of view of an optical system including the field widening lens, regardless of the angle at which the ray entered the lens.

IPC Classes  ?

• G02B 27/10 - Beam splitting or combining systems
• G02B 27/14 - Beam splitting or combining systems operating by reflection only

Abstract

The present invention pertains to the identification of a set of measurement data, using an a priori model database, which is then used in the determination of a pose solution using LADAR data. In particular, a model database of a target scene is created. The model database includes location information for a plurality of points within the target scene, and separation distances between sets of those points defining triangles. LADAR data obtained from a target scene is processed to extract features. Location information and separation distances between sets of extracted features defining triangles are placed in a measurement database. Separation distances contained in the measurement database are compared to separation distances contained in the model database. If a match is found, a rotation quaternion and translation vector are calculated, to transform the data in the measurement database into the frame of reference of the data in the model database. The rotation quaternion and translation vector can be applied to additional sets of data defining additional triangles, to verify that the target scene has been correctly identified. A pose solution and range can then be output.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints

Abstract

A switched beam antenna system is provided. The antenna system includes a plurality of feed elements arranged radially about a center point. A feed switch provides equidistant signal paths between each antenna element and a transceiver. The production of an antenna beam in a desired direction is achieved by controlling a switch to selectively operate a feed element associated with a beam coverage area that encompasses the desired steering angle.

IPC Classes  ?

• H01Q 3/24 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
• H01Q 19/06 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens

Abstract

A pulse data recorder system and method are provided. Upon the arrival or occurrence of an event or signal, the state of a digital switch is set. Upon receiving a pulse from a readout clock, the state of the switch is stored in a buffer memory, and the state of the switch is reset. As the readout clock is run, a time history of the state of the switch is obtained. The pulse data recorder can feature a plurality of unit cells, for use in imaging or other multiple pixel applications.

IPC Classes  ?

• H01J 40/14 - Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for