Abstract
Star sensor was one of the most accurate devices for improving the orientation accuracy of stereo mapping satellite images, which was extremely limited by both of the layout and the accuracy of star sensor. However, star sensor layout was mainly designed for safety and maneuverability of the satellite as a key part of Attitude and Orbit Control Computer (AOCC) system, rather than stereo mapping character; as a result, considerable orientation accuracy is lost, and especially for forward intersection photogrammetry, the pitching angle error was more sensitive than other errors. To improve the performance of stereo mapping satellite, a new approach was proposed. Firstly, two high-precision star cameras were added for the satellite independently, which makes optimal layout of star cameras possible; secondly, optimal layout of star cameras was discussed by the method of Error Weighted of Orientation (EWO) algorithm, where pitch/yaw/roll angle errors were well considered in the orientation error aspect. The result showed that by adding two 0.5″ star cameras and optimal layout design, the pitching angle error was minimized to 0.4″, which was satisfied to the high-precision stereo mapping mission.
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Wang, W.Z., Wang, Q.L., Di, J.J., Yu, Y.B., Zong, Y.H., Gao, W.J. (2020). Star Camera Layout and Orientation Precision Estimate for Stereo Mapping Satellite. In: Urbach, H., Yu, Q. (eds) 5th International Symposium of Space Optical Instruments and Applications. ISSOIA 2018. Springer Proceedings in Physics, vol 232. Springer, Cham. https://doi.org/10.1007/978-3-030-27300-2_11
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DOI: https://doi.org/10.1007/978-3-030-27300-2_11
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