Research on atmospheric refraction correction of airborne electro-optical system target location北大核心CSCD

目标定位精度是评判机载光电系统性能的一项重要指标。对于高空机载光电系统，目标定位精度除受传感器、测距仪、载荷平台稳定精度、飞行平台稳定精度和位置精度等综合因素影响外，还受大气折射的影响，对于高空机载光电系统远距离对地观测，大气折射对目标定位的影响尤为严重。该文从大气折射对目标定位的影响机理出发，给出大气模型，分析大气折射的影响因素，并基于介于圆球体和参考旋转椭球体之间的地球模型给出了大气折射误差模型；基于该文提出的近似参考旋转椭球体地球模型，仿真分析了大气折射对目标定位的影响结果。分析结果对于机载光电系统远距离目标定位大气折射修正具有重要指导意义。

Research on atmospheric refraction correction of airborne electro-optical system target location

The target location accuracy is an important index to evaluate the performance of airborne electro-optical system. For the high-altitude airborne electro-optical system, the target location accuracy is not only affected by the comprehensive factors such as sensor, rangefinder, stabilization accuracy of load platform, stabilization accuracy and position accuracy of flight platform, but also affected by the atmospheric refraction. For the long-distance ground observation of high-altitude airborne electro-optical system, the impact of atmospheric refraction on target location is particularly serious. Starting from the influence mechanism of atmospheric refraction on target location, an atmospheric model was given to analyze the influence factors of atmospheric refraction. Based on the earth model between the sphere and the reference rotating ellipsoid, the atmospheric refraction error model was given. Finally, the influence of atmospheric refraction on target location was analyzed according to the proposed earth model of approximate reference rotating ellipsoid. The analysis results have important guiding significance for the atmospheric refraction correction of airborne electro-optical system for long-distance target location.