双星光学观测体系的目标定位误差分析

Position error analysis of double satellites optical observation system

为提高双星光学观测体系的定位精度,构建了新型双星光学定位系统。通过对卫星、光电观测平台的建模,构建了地惯系下平台与目标间的观测矢量模型。利用几何定位算法,推导出了地惯系下的目标定位模型与定位误差模型,并利用蒙特卡罗法获得了定位误差分布。在此基础上,引入了小波理论进行误差的优化重构,以提高双星光学观测体系的定位精度。利用测量数据进行仿真,结果表明,引入小波理论对目标定位误差进行降噪重构后,可以使目标定位精度提高30%,为工程上减小目标定位误差提供了新的思路。

In order to improve the positioning accuracy of double satellites optical observation system, a new type of optical positioning system is constructed. Based on the modeling of the satellite and the optical observa- tion platform, the observation vector model between the platform and the target is constructed. According to the geometric location algorithm, the target location model and the location error model are derived, and the location error distribution is obtained by the Monte Carlo method. On this basis, wavelet theory is brought to optimize and reconstruct error for improving the positioning accuracy of double satellites optical observation system. Using the measured data for simulation, the results show that the wavelet theory introduced to recon- struct the position error can make the positioning accuracy increase by 30%. It provides a new way to reduce the location error in engineering.