空间目标轨迹自适应天空背景光谱辐射特性测量系统

Sky Background Spectral Radiance Measurement System for Self-Adapting Spatial Object Track

针对空间目标高精度、实时性等测量要求,通过对天空背景光谱辐射特性的分析,提出一种空间目标轨迹自适应天空背景光谱辐射特性测量系统。该系统以力矩电机和光电编码器作为转动控制基础,加入时统系统为实时测量提供保证,引入测量电视确保系统指向精度,以积分球和光纤光谱仪作为接收器件,实现准确可靠的测量。通过对系统的光谱辐射定标及外场引导测量实验,结果表明,系统光谱位置最大误差为0.31 nm,其对于天空背景光谱辐射亮度的测量结果与利用大气辐射传输模型软件MODTRAN模拟计算的结果具有较好的一致性,所得到的天空背景相关特性与天空背景的真实情况相符合。该系统能够实现对空间目标所经过的天空背景光谱辐射特性的自动测量。

In order to satisfy the measurement requirements of high accuracy and real-time, an automatic sky background spectral radiance measurement system for self-adapting spatial object track is proposed by means of analyzing sky background spectral radiance characteristic. The rotation controller of the system is composed of moment motor and photoelectric encoder. The system is capable of the real-time measurement by the hand of the time unify. The system includes measuring radiovisor system, which can assure pointing accuracy. The re- ceiver of system consists of integrating sphere and optical fiber spectrograph. Through the spectral radiance cal- ibration and guiding measurement experiment fulfilled in external field by using the system, the experiment re- sult indicates that the maximum wavelength error is 0.31 nm, the measurement of this system for the sky back- ground spectral radiance coincides with the analog calculation which is provided by MODTRAN, and the sky background spectral radiance characteristic which is measured by the system is in agreement with the actual characteristic of sky background. The system is able to achieve automatic soectral radiance measurement.