卫星实验用小型地球模拟器张角测试方法的研究

The methods research based on field angle testing of experimental mini-satellite earth simulator

采用红外技术,提出了一种地球模拟器张角测试方法。叙述了张角测试系统的组成、总体结构和测量原理,详细讨论和分析了用于测试地球张角的关键部件小视场红外探头的设计方法,从地球模拟器张角测试需要出发,当采用一束细光线进行测量时,希望红外探头的视场角越小越好,但是视场角变小,会使张角标定系统的信噪比降低,从而带来较大测量误差,为此采用超半球浸没透镜的方法有效解决了探头视场过小而信噪比过低、致使张角测试精度降低的难题,提高了张角测试精度。利用该系统对地球模拟器张角进行了实测,结果表明地球张角误差小于±0.05°。

Applying of infra-red technology, present one of testing methods to field angle of earth simulator. Overall structure, composi- tion and measurement principle of the calibration system for flare an- gle are described in this paper, and the design method for small field of view infrared probe the key component to calibrate the flare angle is discussed and analyzed detailed. Considering the requirement of the flare angle calibration for the earth simulator, field angle of the in- frared probe is expected to be better with it smaller. But the diminish- ment of the field angle can make the signal-to-noise ratio of the de- vice for flare angle calibration reduce, therefore, adopting the meth- od of hyper-hemispherical lens availably settled the difficult problem that the signal-to-noise ratio is excessive low as the field of view for probe is excessive small, the calibration accuracy of flare angle is improved. The earth angular of simulator was tested by the earth angular demarcating system, and the results show that the three earth angular errors less than ±0.05°, and the demarcating method is quite right.