偏振导航测试系统空间分辨率研究

Research on Spatial Resolution of Polarization Navigation Test System

针对目前偏振导航测试系统空间分辨率研究尚不完全的问题,基于瑞利散射理论,提出了一种偏振导航测试系统空间分辨率计算方法,搭建了天空偏振光空间分辨率仿真平台,仿真分析了半球区域测试系统空间分辨率分布情况。仿真结果表明:太阳直射点所在纬度线上,偏振导航测试系统纬度分辨率远小于经度分辨率,偏振导航测试系统受纬度波动影响较大;太阳直射点所在经度线上,经度分辨率远小于纬度分辨率,测试系统受经度波动影响较大。非直射点经纬度线,纬度值偏离直射点10°~20°纬度范围,经纬度分辨率值比较接近,测试系统受经纬度波动影响相差不大;纬度值偏离直射点30°~50°纬度范围,经度分辨率小于纬度分辨率,测试系统受经度波动大于受纬度波动影响;偏离直射点50°以上纬度范围,经度分辨率远小于纬度分辨率,测试系统受经度波动影响远大于受纬度波动影响。

In view of the current situation that the research on the spatial resolution of the polarization navigation test system is not complete, a method for calculating the spatial resolution of the polarization navigation test system was proposed based on the Rayleigh scattering theory,and the simulation platform for the spatial resolution of the polarized light in the sky was built. The distribution of longitude and latitude resolutions in the hemisphere was also analyzed. The simulation results showed that on the latitude line where the direct sun point was located,the latitude resolution was much smaller than the longitude resolution, and the test system was greatly affected by latitude;on the longitude line where the direct sun point was located, the longitude resolution was much smaller than the latitude resolution. The test system was greatly affected by longitude. On the latitude and longitude area where the non-direct beam point was located, deviating from the latitude range of 10°~20°of the direct beam point, the test system was basically the same as affected by latitude and longitude. Deviating from the latitude range of30°~50°of the direct beam point, the longitude resolution was smaller than the latitude resolution, and the test system was more affected by the longitude fluctuation than by the latitude fluctuation. Longitude resolution was much smaller than latitude resolution and the test system was far more affected by longitude fluctuation than by latitude fluctuation when it deviated from the latitude range of more than 50° from the direct beam point.