太阳光压模型中面质比误差对IGSO卫星轨道预报的影响分析

Analysis of Effects of Area-to-Mass Ratio on the Errors in the Prediction of the Orbit of an IGSO Satellite through the Solar Radiation-Pressure Model

太阳光压是影响高轨卫星轨道精密确定的主要因子之一,这种摄动的有效模制将进一步改进卫星轨道的预报精度。主要对太阳光压模型中面质比误差对地球倾斜同步轨道卫星轨道预报的影响进行了分析。20%面质比参数标定误差对地球倾斜同步轨道卫星位置预报影响仿真结果显示:一天内前16 h,x、z分量的预报误差幅度相对较小,y分量误差相对较大;一天内最后8 h,x、y、z各分量误差发散明显,但z分量的误差发散程度较大。20%面质比参数标定误差对地球倾斜同步轨道卫星速度预报影响仿真结果显示,一天内,x、y、z各分量的预报误差幅度不超过1 mm/s。

The solar radiation pressure is one of the key parameters in precision orbit determination of a high-altitude satellite. It is important to precisely model the solar radiation pressure in precision orbit determination and orbit prediction. The author presents an analysis of the effects of area-to-mass ratio on the errors in the prediction of the orbit of an IGSO satellite using the solar radiation-pressure model. Assuming that the relative error for area-to-mass ratio is 20% , the author uses simulations and show the following results. （ 1 ） During the first 16 hours in a day the prediction errors of both the x and z components of position tend to be smaller than those in the y component. （2） However, during the last 8 hours in a day, it appears that errors in the x, y, and z components tend to be much more divergent, especially in the z component. The simulations have also shown the prediction errors of x, y, and z components of velocity are at most 1 mm/s.