Results 11 to 20 of about 1,366,151 (284)
A High-Accuracy Star Centroid Extraction Method Based on Kalman Filter for Multi-Exposure Imaging Star Sensors [PDF]
Sensors, 2023 A multi-exposure imaging approach proposed in earlier studies is used to increase star sensors’ attitude update rate by N times. Unfortunately, serious noises are also introduced in the star image due to multiple exposures.
Wenbo Yu, Hui Qu, Yong Zhang
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A Fast Star Identification Algorithm of Star Sensors in the LIS Mode
Remote Sensing, 2022 In the South Atlantic Anomaly (SAA) area, due to the influence of transient noise caused by space radiation, a star sensor can easily stay in the lost-in-space (LIS) mode for a long time.
Kaili Lu +4 more
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A Novel Error Model of Optical Systems and an On-Orbit Calibration Method for Star Sensors [PDF]
Sensors, 2015 In order to improve the on-orbit measurement accuracy of star sensors, the effects of image-plane rotary error, image-plane tilt error and distortions of optical systems resulting from the on-orbit thermal environment were studied in this paper.
Shuang Wang, Yunhai Geng, Rongyu Jin
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Research on Star Sensor Imaging Simulation Under Near-Space Hypersonic Non-Equilibrium Flow Conditions [PDF]
SensorsIn order to address the difficulty in acquiring degraded images for star sensors under hypersonic conditions, this paper proposes a star sensor imaging simulation model which can effectively analyze the influence of thermochemical non-equilibrium flow on
Zhen Liao +7 more
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Remote Sensing, 2020 Owing to the vibrations and thermal shocks that arise during the launch and orbit penetration process, the on-orbit installation parameters of multiple star sensors are different from the on-ground measured parameters, causing inconsistencies in the ...
Yanli Wang, Mi Wang, Ying Zhu
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A Curvature-Based Multidirectional Local Contrast Method for Star Detection of a Star Sensor
Photonics, 2021 Stray light, such as sunlight, moonlight, and earth-atmosphere light, can bring about light spots in backgrounds, and it affects the star detection of star sensors.
Kaili Lu +5 more
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Theoretical Limits of Star Sensor Accuracy [PDF]
Sensors, 2019 To achieve mass, power and cost reduction, there is a trend to reduce the volume of many instruments aboard spacecraft, especially for small spacecraft (cubesats or nanosats) with very limited mass, volume and power budgets. With the current trend of miniaturizing spacecraft instruments one could naturally ask if is there a physical limit to this ...
Marcio A. A. Fialho, Daniele Mortari
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Low frequency error analysis and calibration for multiple star sensors system of GaoFen7 satellite
Geo-spatial Information Science, 2022 The GaoFen7 (GF7) optical satellite is the first Chinese civilian sub-meter high-resolution stereo mapping satellite and is equipped with a double linear array camera and laser altimeter to achieve large-scale topographic mapping. To improve the accuracy
Yanli Wang +3 more
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International Conference on Space Optics — ICSO 1997, 2018 This paper, “Novel star sensor," was presented as part of International Conference on Space Optics—ICSO 1997, held in Toulouse, France.
Ad A. Maas +3 more
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Image Degradation Model for Dynamic Star Maps in Multiple Scenarios
Photonics, 2022 To meet the ground test requirements of star sensors, we establish the star map simulation algorithm and the interactive interface in multiple scenarios.
Haima Yang +8 more
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