Results 41 to 50 of about 32,600 (279)
Star centroiding error compensation for intensified star sensors
Optics Express, 2016 A star sensor provides high-precision attitude information by capturing a stellar image; however, the traditional star sensor has poor dynamic performance, which is attributed to its low sensitivity. Regarding the intensified star sensor, the image intensifier is utilized to improve the sensitivity, thereby further improving the dynamic performance of ...
Jie, Jiang +4 more
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Blurred Star Image Processing for Star Sensors under Dynamic Conditions [PDF]
Sensors, 2012 The precision of star point location is significant to identify the star map and to acquire the aircraft attitude for star sensors. Under dynamic conditions, star images are not only corrupted by various noises, but also blurred due to the angular rate of the star sensor.
Weina Zhang, Wei Quan, Lei Guo
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IEEE Access, 2020 A fast and robust star identification algorithm is proposed in this paper. The algorithm is derived from the grid algorithm but significantly improves the robustness by increasing the probability of the correct close neighbor star and reducing the ...
Jian Li +3 more
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Research and application of domestic micro star sensor
Dianzi Jishu Yingyong, 2018 Star sensor is an important part of the attitude control of spacecraft. Based on the homemade anti-radiation CMOS APS chip and SoPC control chip, the optical and electrical system of a miniature star sensor is designed, and finally the miniaturization ...
Zheng Tuo, Wang Guanya
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Processing Centroids of Smearing Star Image of Star Sensor [PDF]
Mathematical Problems in Engineering, 2014 A novel method was presented for increasing the accuracy of subpixel centroid estimation for smearing star image. Model of the smearing trajectory of smearing star was built. It helped to study the analytical form of the errors, caused by image smearing, for centroid estimation.
Yufu Liao +3 more
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Star Image Prediction and Restoration under Dynamic Conditions
Sensors, 2019 The star sensor is widely used in attitude control systems of spacecraft for attitude measurement. However, under high dynamic conditions, frame loss and smearing of the star image may appear and result in decreased accuracy or even failure of the star ...
Di Liu +3 more
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Star-Identification System Based on Polygon Recognition
Aerospace, 2023 Accurate attitude determination is crucial for satellites and spacecraft. Among attitude determination devices, star sensors are the most accurate. Solving the lost-in-space problem is the most critical function of the star sensor.
Gustavo E. Ramos-Alcaraz +2 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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Research on Partitioning Algorithm Based on Dynamic Star Simulator Guide Star Catalog
IEEE Access, 2021 The simulated star map generated by the dynamic star simulator cannot meet the current demand for calibration of the star map recognition rate of the star sensor due to the huge amount of guide star catalog data and the slow retrieval process. This paper
Guangxi Li +6 more
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Evaluation of a low cost wireless chemical sensor network for environmental monitoring [PDF]
, 2008 We present work on the development and testing of a low-cost wireless chemical sensor network (WCSN) for monitoring irritant/toxic gases in the environment.
Dermot Diamond +7 more
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