偏振光谱成像仪太阳与月球联合在轨标定技术研究

航天遥感器入轨及在轨运行期间，由于重力、应力释放、热以及元器件老化等因素的综合影响需要对其进行在轨标定.为了提高星上辐射标定精度，提出了对月标定和太阳标定相结合的在轨标定方法.通过对月成像实现中心场的在轨绝对辐射标定，标定仪器辐射特性的星地差异和在轨的变化情况.通过太阳标定获取探测器的非均匀性变化.对偏振光谱成像仪标定不确定度进行了分析，研究结果表明：绝对辐射标定总不确定度为3.77%，满足5%辐射标定精度要求.

Combining Lunar and Solar On-Orbit Calibration for Polarization Spectral Imager

Due to the comprehensive influence of gravity, stress release, heat and component aging, it is necessary to calibrate the space remote sensor periodically on-orbit. In order to improve the accuracy of spaceborne radiation calibration, an on-orbit calibration method was proposed, combining lunar calibration and solar calibration. Firstly, using lunar imaging, the on-orbit absolute radiation calibration of the central field was carried out, and the satellite ground difference and on-orbit change of radiation characteristics of the instrument were calibrated. Then, using solar calibration, the non-uniformity of the detector was obtained. Finally, the calibration uncertainty of the polarization spectrum imager was analyzed. The results show that the total uncertainty of absolute radiation calibration is 3.77%, meeting the requirement of 5% radiation calibration accuracy. The method proposed in this paper provides an important technical support for improving the calibration accuracy of remote sensors and the detection ability of aerospace load.