Multiple blur of star image and the restoration under dynamic conditions |
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| Authors: | Wu Xiaojuan Wang Xinlong |
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| Institution: | 1. Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 711-873, Korea;2. School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;1. Beijing Institute of Tracking and Telecommunications Technology, 26 Beiqing Road, Beijing 100094, China;2. Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China;1. Dipartimento di Matematica e Informatica “U. Dini”, Università di Firenze, Viale Morgagni 67/A, I-50134 Firenze, Italy;2. Dipartimento di Scienze e Alta Tecnologia, Università degli Studi dell''Insubria, Via Valleggio 11, I-22100 Como, Italy;1. FMF, University of Ljubljana, Jadranska 19, Ljubljana, Slovenia;2. IMFM, Jadranska 19, Ljubljana, Slovenia;3. IAM, University of Primorska, Muzejski trg 2, Koper, Slovenia;4. FAMNIT, University of Primorska, Glagolja?ka 8, Koper, Slovenia;1. Guidance & Control Analysis Group, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA;2. High Contrast Imaging Group, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA;3. GN&C Hardware & Testbed Development Group, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA;4. Guidance & Control Analysis Group, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA;5. Optics Section, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA;6. Global Positioning Satellite Systems Group, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA |
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| Abstract: | According to the flight characteristics of vehicle under high dynamic conditions, the impact of linear, angular, and vibrational motion on star sensor imaging was researched. Then, the mathematical model of motion blur corresponding to various flight conditions was deduced, and the star centroiding accuracy affected by motion blur was analyzed subsequently. On this basis, the mechanism of multiple blur was discussed. In order to ensure the accuracy of star sensor in high dynamic environment, a restoration method was proposed to remove the multiple blur. Finally, simulations are implemented to validate the restoration method. |
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