20 February 2018 A novel double fine guide sensor design on space telescope
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To get high precision attitude for space telescope, a double marginal FOV (field of view) FGS (Fine Guide Sensor) is proposed. It is composed of two large area APS CMOS sensors and both share the same lens in main light of sight. More star vectors can be get by two FGS and be used for high precision attitude determination. To improve star identification speed, the vector cross product in inter-star angles for small marginal FOV different from traditional way is elaborated and parallel processing method is applied to pyramid algorithm. The star vectors from two sensors are then used to attitude fusion with traditional QUEST algorithm. The simulation results show that the system can get high accuracy three axis attitudes and the scheme is feasibility.
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Xu-xu Zhang, Xu-xu Zhang, Da-yi Yin, Da-yi Yin, "A novel double fine guide sensor design on space telescope", Proc. SPIE 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 1069706 (20 February 2018); doi: 10.1117/12.2305895; https://doi.org/10.1117/12.2305895

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