Results 181 to 190 of about 20,994 (210)
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Improving night sky star image processing algorithm for star sensors
Journal of the Optical Society of America A, 2014In this paper, the night sky star image processing algorithm, consisting of image preprocessing, star pattern recognition, and centroiding steps, is improved. It is shown that the proposed noise reduction approach can preserve more necessary information than other frequently used approaches. It is also shown that the proposed thresholding method unlike
Mohammad Vali, Arbabmir +3 more
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STAR PATTERN RECOGNITION SENSOR OF THE ASTRO TYPE
IFAC Proceedings Volumes, 1992Abstract A Star Pattern Recognition Sensor (SPRS) system has been designed for autonomous, all stellar attitude determination. The system consists of three optical heads, including the CCD camera, three image processors and an attitude determination processor. The first system, the ASTRO 1, was realized from 1984 to 1987 and launched in November 1989
Ch. Elstner, D. Ratzsch, W. Skarus
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Lightweight rainfall radiometer STAR aircraft sensor
IEEE International Geoscience and Remote Sensing Symposium, 2003The X-Band Lightweight Rainfall Radiometer using synthetic thinned aperture radiometer technology (LRR-X STAR) is an aircraft microwave sensor that is jointly under development by the NASA Goddard Space Flight Center and the University of Michigan. It operates at 10.7 GHz with 86+ simultaneous 2.1/spl deg/ HPBW antenna beams distributed over a /spl ...
Christopher S. Ruf +8 more
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Design and application of star map simulation system for star sensors
SPIE Proceedings, 2013Modern star sensors are powerful to measure attitude automatically which assure a perfect performance of spacecrafts. They achieve very accurate attitudes by applying algorithms to process star maps obtained by the star camera mounted on them. Therefore, star maps play an important role in designing star cameras and developing procession algorithms ...
Feng Wu +4 more
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A star pattern recognition algorithm for the double-FOV star sensor
IEEE Aerospace and Electronic Systems Magazine, 2015A reliable attitude determination system is critical to the success of spacecrafts [1]–[3]. As high accuracy and high reliability devices, star sensors play an important role in attitude determination for satellites [4]–[6]. Based on the star images sampled by star sensors, the locations of the star image in the star sensor coordinate system can be ...
Baohua Li, Qi Sun, Tongshuang Zhang
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Algorithm for Screening Navigation Stars on Star Sensors
Laser & Optoelectronics Progress, 2021王海涌 Wang Haiyong, 徐皓 Xu Hao
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An approach on motion blurred star map simulation for star sensor
Optical Sensing and Imaging Technologies and Applications, 2018In order to test the high dynamic performance of the on-orbit star sensor and develop better software for motion compensation, a simulation algorithm of blurred star image is proposed. First, the projection position of the guide star on the star sensor image plan is calculated by the pinhole model.
Zhanrong Zhou +4 more
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Inertial Information Based Star Detection for Airborne Star Sensor
SSRN Electronic Journal, 2022Hongjie Lei +9 more
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Effects of gamma radiation on the performance of star sensors for star map recognition
Radiation Physics and Chemistry, 2023Lin Wen, Tingyu Wang
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A Star Spot Extraction Method Based on SSA-UNet for Star Sensors Under Dynamic Conditions
IEEE Sensors Journal, 2023Xinguo Wei, Gangyi Wang, Jian Li
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