光谱滤波技术对星等测量精度的影响

 白天对空间目标进行观测时，采用光谱滤波技术可以提高光电系统的极限星等探测能力。针对光谱滤波探测特点，基于现有测量方法，结合光谱反射特性，分析了光谱滤波技术对测量精度的影响，给出了修正方法；利用光电系统对某空间目标进行了实际测量，根据事后修正方法进行了仿真研究，对实际测量值与事后修正值进行了比对分析。分析表明：光谱滤波技术虽然提高了光电系统的探测能力，但对测量精度带来了较大的影响，最大精度可为0.5等星。

Precision of magnitude measurement caused by spectral filtering technology

The limiting magnitude of an electro-optical system can be improved through the spectral filtering technology in daytime space target observation. Considering the characteristic of spectral filtering and the inconsistent responses to different wave bands, the precision of magnitude measurement for spectral filtering technology was analyzed based on the measurement method in exist, and a correction method was given. The magnitude of a space target was measured by an electro optical system based on the measurement way in existence and the result was simulated through the correction method. The two results were analyzed comparatively, proving that the spectral filtering can improve the detecting ability at the expense of precision deterioration (0.5 magnitude at most)．