月光对天绘一号星敏感器测姿的影响

Effect of the Moon Lights on the TH -1 Star Sensor Attitude Determination

本文给出了天绘一号立体测绘卫星星敏感器测量偏差的三种算法。为了研究月光对天绘一号星敏感器定姿的影响，分析了一组月光进入星敏感器视场的实测数据，结果表明工作条件最恶劣的星敏感器C在月光进入视场后姿态精度仍达到10角秒左右，且测量噪声和定姿偏差无显著变化，说明天绘一号星敏感器鲁棒性较好。

In this paper, three algorithms are developed for estimating attitude measuring error in connection with the TH - 1 star sensor, and a set of real data are analyzed to investigate the effect of the Moon lights on the attitude determination. The re- sults show that the attitude accuracy of star sensor C under the worst conditions is still about 10 arc - sec when the moonlights enter the field of view. Besides, no obvious changes of the random noise and attitude deviation occur when the moonlight is in the effective field of view, which proves that the TH - 1 star sensor is robust.