伪随机脉冲对卫星轨道拟合精度影响分析

研究伪随机脉冲在吸收低轨卫星和4大导航系统卫星未模型化摄动力方面的有效性,分析其对拟合轨道精度的影响。结果表明,伪随机脉冲能够有效吸收低轨卫星及GNSS卫星未模型化的摄动力。对于低轨卫星,伪随机脉冲能够有效模拟大气阻力对轨道的影响,达到mm级拟合精度;对于GNSS卫星,伪随机脉冲能够在一定程度上吸收太阳光压摄动,尤其是与ECOM太阳光压模型联合使用,能够充分吸收ECOM模型未能吸收的摄动力,只需每天设置一组伪随机脉冲参数,其拟合精度能达到mm级。

Influence of Pseudo-Stochastic Pulse on Satellite Orbit Fitting

We study the influence of pseudo-stochastic pulse in the absorption of low earth orbit (LEO) satellites and the unmodeled perturbation forces of four navigation systems. We also analyze the influence of accuracy on fitting orbit. The results show that pseudo-stochastic pulse can effectively absorb the unmodeled perturbation forces of LEO and GNSS satellites. For LEO satellites, pseudo-stochastic pulse can simulate the influence of atmospheric resistance on orbit, and achieve millimeter level fitting precision. For GNSS satellites, pseudo-stochastic pulse can only absorb sun light pressure perturbation to some extent; however, combined with the ECOM sun light model it can fully absorb perturbation forces unabsorbed by the ECOM model and achieve millimeter level fitting precision, requiring setting up a set of pseudo-stochastic pulse parameters every day.