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探测性能决定了偏振遥感系统的解析精度,但分振幅系统因多种因素引入的仪器偏振使解析精度的提高受到限制。在分析测量原理的基础上,研究了分振幅光偏振探测系统测量矩阵的多点定标方法,推导了偏振方位角等间隔取样偏振定标的条件;通过平台搭建与比较实验,利用多点定标方法测量了航空多角度偏振辐射计(AMPR)的穆勒矩阵,分析了测量结果的不确定性。结果表明,定标后的AMPR测量误差<0.5%、不确定度<0.5%,满足遥感系统的探测要求,证明了多点定标方法的可行性。
The detection performance determines the resolution accuracy of the polarization remote sensing system, but the polarization of the instrument introduced by many factors in the sub-amplitude system limits the improvement of the resolution accuracy. Based on the analysis of the measurement principle, the multi-point calibration method of the measurement matrix of polarization amplitude polarization detection system is studied, and the conditions of the polarization azimuth sampling azimuths are deduced. Through platform construction and comparison experiments, The standard method was used to measure the Mueller matrix of aero-multi-polarization polarimeter (AMPR), and the uncertainty of measurement results was analyzed. The results showed that the calibration error of AMPR was less than 0.5% and the uncertainty was less than 0.5%, which met the detection requirements of remote sensing system and proved the feasibility of multi-point calibration.