Inspired by nature, the Sky Position and Azimuth Sensing System (SkyPASS) utilizes the polarization patterns of the sky to achieve highly accurate heading determination (0.1125° RMS) in conditions where tradition...
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ISBN:
(数字)9798331523176
ISBN:
(纸本)9798331523183
Inspired by nature, the Sky Position and Azimuth Sensing System (SkyPASS) utilizes the polarization patterns of the sky to achieve highly accurate heading determination (0.1125° RMS) in conditions where traditional sun and star sensors fail to operate. By tracking sky polarization, SkyPASS offers improved performance under cloud cover, beneath canopies, in urban environments, and during civil and nautical twilight, as well as at sunrise and sunset. Polarization, a fundamental property of light, enhances conventional sensing methods that typically measure brightness and color. The Rayleigh scattering of light creates a distinct sky polarization pattern that can be leveraged for navigation. polaris has recently developed advanced full-image algorithms that enhance the sensor's capability and availability, particularly when the sun is high in the sky and obscured by clouds and when the sensor is physically tilted beyond 10°. These algorithms enable the determination of sun azimuth and elevation from a sky polarization image, regardless of sensor orientation, facilitating absolute position capability. A polarimeter equipped with these full-sky image algorithms can identify regions of interest (ROIs) characterized by high degrees of linear polarization (DoLP), resulting in more accurate heading and positioning solutions. When blue skies are visible, SkyPASS can reliably produce heading and position data. Additionally, polaris's clutter rejection algorithms enhance SkyPASS’s performance by filtering out clouds from the data. The results from experimental testing on static platforms in various conditions—including clear, cloudy, and overcast skies—will be presented by polaris. SkyPASS serves as a valuable complement to visual navigation systems that may have degraded performance over featureless terrains like open water and deserts, as well as inertial sensors that drift when GPS signals are contested. Designed for ease of integration, this plug-and-play sensor is optimize
The Focusing Optics X-ray Solar Imager 4 (FOXSI-4) is a heliophysics sounding rocket experiment that is currently in its fourth launch campaign. The payload is comprised of seven x-ray telescopes, which each consist o...
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The Marshall 100-Meter X-ray Beamline is a user facility for x-ray and EUV optics and instrumentation calibration, located at NASA’s Marshall Space Flight Center in Huntsville, Alabama. Also known as the Stray Light ...
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We developed a real-time vehicle detection system combining YOLOX and Kalman filter tracking, optimized for 3D Light detection and ranging (LiDAR) data. Using a TigerCub Flash LiDAR camera, our method eliminates color...
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ISBN:
(数字)9798350367621
ISBN:
(纸本)9798350367638
We developed a real-time vehicle detection system combining YOLOX and Kalman filter tracking, optimized for 3D Light detection and ranging (LiDAR) data. Using a TigerCub Flash LiDAR camera, our method eliminates color variability, enhancing detection accuracy. The machine learning models were deployed on an NVIDIA Jetson Orin Nano, achieving over 95% precision in real-time at 30 frames-per-second.
A short wave infrared polarimeter comprising a pixelated polarizer array and an Indium-Gallium-Arsenide (“InGaAs”) focal plane array. The short wave infrared polarimeter optionally includes a micro-lens array and/or...
标准号:
US2019056273(A1)
A short wave infrared polarimeter comprising a pixelated polarizer array and an Indium-Gallium-Arsenide (“InGaAs”) focal plane array. The short wave infrared polarimeter optionally includes a micro-lens array and/or an aperture layer
A short wave infrared polarimeter comprising a pixelated polarizer array and an Indium-Gallium-Arsenide (“InGaAs”) focal plane array. The short wave infrared polarimeter optionally includes a micro-lens array and/or...
标准号:
EP3443309(A1)
A short wave infrared polarimeter comprising a pixelated polarizer array and an Indium-Gallium-Arsenide (“InGaAs”) focal plane array. The short wave infrared polarimeter optionally includes a micro-lens array and/or an aperture layer
A short wave infrared polarimeter comprising a pixelated polarizer array and an Indium-Gallium-Arsenide (“InGaAs”) focal plane array. The short wave infrared polarimeter optionally includes a micro-lens array and/or...
标准号:
EP3443309(A4)
A short wave infrared polarimeter comprising a pixelated polarizer array and an Indium-Gallium-Arsenide (“InGaAs”) focal plane array. The short wave infrared polarimeter optionally includes a micro-lens array and/or an aperture layer.
A short wave infrared polarimeter comprising a pixelated polarizer array and an Indium-Gallium-Arsenide (“InGaAs”) focal plane array. The short wave infrared polarimeter optionally includes a micro-lens array and/or...
标准号:
US10451483(B2)
A short wave infrared polarimeter comprising a pixelated polarizer array and an Indium-Gallium-Arsenide (“InGaAs”) focal plane array. The short wave infrared polarimeter optionally includes a micro-lens array and/or an aperture layer.
A method for detecting the presence of foreign fluids on surface comprises estimating an expected polarization response for a foreign fluid desired to be detected. Oil from an oil spill is one such foreign fluid. A po...
标准号:
US2018328836(A1)
A method for detecting the presence of foreign fluids on surface comprises estimating an expected polarization response for a foreign fluid desired to be detected. Oil from an oil spill is one such foreign fluid. A polarimeter records raw image data of a surface (e.g., the surface of water) to obtain polarized images of the surface. IR and polarization data products are computed from the polarized images. The IR and polarization data products are converted to multi-dimensional data set to form multi-dimensional imagery. Contrast algorithms are applied to the multi-dimensional imagery to form enhanced contrast images, from which foreign fluids can be automatically detected.
A method using Long Wave Infrared Imaging Polarimetry for improved mapping and perception of a roadway or path and for perceiving or detecting obstacles comprises recording raw image data using a polarimeter to obtain...
标准号:
EP3186606(A4)
A method using Long Wave Infrared Imaging Polarimetry for improved mapping and perception of a roadway or path and for perceiving or detecting obstacles comprises recording raw image data using a polarimeter to obtain polarized images of the roadway or area. The images are then corrected for non-uniformity, optical distortion, and registration. IR and polarization data products are computed, and the resultant data products are converted to a multi-dimensional data set for exploitation. Contrast enhancement algorithms are applied to the multi-dimensional imagery to form enhanced object images. The enhanced object images may then be displayed to a user, and/or an annunciator may announce the presence of an object. Further, the vehicle may take evasive action based upon the presence of an object in the roadway.
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