论文部分内容阅读
介绍了星敏感器定标过程中多种因素对定标精度的影响,其中着重讨论了定标光源与待观测星的光谱非匹配对星敏感器定标精度产生的影响。通过数值模拟计算,定量分析了在0等星时由于不同色温光源与待测目标光谱非匹配所产生的测量误差。分析结果表明,光谱非匹配造成的星敏感器的定标误差最高可以达到0.323个星等。提出一种光谱可调谐光源实施方案,可以模拟任意光谱分布的星体并用于星敏感器定标,试验结果表明定标精度可以提升至0.62%以内。
The influence of many factors on the calibration accuracy of the star sensor calibration is introduced. The influence of the non-matching of the calibration source and the satellite to be observed on the star calibration accuracy is discussed. Through the numerical simulation, the measurement error caused by the non-matching of the different color temperature light source and the target spectrum to be measured is quantitatively analyzed in the case of 0 equal star. The analysis results show that the star calibration error caused by spectral mismatch can reach as high as 0.323 magnitude. A scheme of spectral tunable light source is proposed, which can simulate the stars with arbitrary spectral distribution and is used to calibrate the star sensor. The experimental results show that the calibration accuracy can be improved to within 0.62%.