星载光学遥感系统偏振耦合误差分析与修正方法研究

星载遥感器偏振灵敏度带来的偏振测量误差会影响获取数据的准确性,该误差作为系统误差将直接影响到数据应用.文章采用矢量辐射传输模型模拟遥感器(以中等分辨率成像光谱仪为例)入瞳处信号偏振与遥感器偏振耦合特性,分析了遥感器偏振灵敏度分别为2%、5%、7%时,遥感系统的测量误差分布情况,发现偏振耦合误差直接影响获取数据的真实性和...

Analysis and Correction Method of the Polarization Coupling Error in Optical Remote Sensing System on Satellite

The polarization measurement error introduced by polarization sensitivity of satellite remote sensor can influence the accuracy of data.This systematic error will directly impact on the quantitative application of remote sensing data.The polarization coupling effect between the top of atmosphere(TOA) polarized light and the optical remote sensing system on satellites is simulated by using vector radiative transfer model(6SV) with the imaging geometry of MODIS.The error distributions of the TOA radiance measurements with different polarization sensitivities of 2%,5% and 7% are analyzed.The results show that the polarization coupling error can directly influence the reliability and consistency of the satellite observations.The effective data sets in the field of view decrease with the increase of the polarization sensitivity and are even lower than 30%.The method of the compensation for the polarization coupling error due to the atmosphere is proposed,which proves to be effective.