为了研究航天偏振辐射计的偏振测量精度，从偏振参量的反演过程出发，结合偏振辐射定标的方法，得出Wollaston棱镜安装角度误差和因加工工艺等造成的光束非正交的角度误差对偏振测量有一定的影响。结果表明，在角度误差一定的前提下，偏振度测量误差随入射光偏振态的变化而变化；当Wollaston棱镜角度误差都控制在0．1°内，偏振度测量精度满足航天偏振辐射计的指标要求。

In order to study the requirements of space polarizing radiometer on measurement accuracy of degree of polarization,the influence of angular error of Wollaston prism on degree of polarization is presented based on the inversion of the polarization parameters and the method of the radiometric calibration. The results show that measurement errors of degree of polarization change with polarization state of incident light while keeping angular error of Wollaston prism fixed. Measurement accuracy of degree of polarization meets the specification of space polarizing radiometer if the angular error of Wollaston prism is less than 0.1°.