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随着卫星对地测量精度要求的不断提高,对卫星轨道的精度要求也随之提高.目前Topex,Jason-1,Jason-2等一系列海洋测地卫星的轨道计算精度已经达到厘米量级,相应对卫星动力学模型的要求也越来越精细.以Topex海洋测地卫星为背景,考虑卫星帆板有规律的运动,将其几何形状简化为高精度轨道计算中比较通用的Boxing-Wing模型,计算了Topex卫星的Boxing-Wing模型在轨运行中受到的太阳光压力及光压力矩.考虑卫星姿态和轨道耦合的情况下,计算了太阳光压力及光压力矩对Topex卫星轨道半长轴和卫星姿态的影响.通过一个轨道周期的计算可知,光压对卫星轨道半长轴的影响大约为9 cm,对卫星滚动角和俯仰角的影响在6°左右,因此,在高精度的轨道计算和姿态控制中这个影响是应该考虑的.
With the continuous improvement of satellite geodetic precision requirements, the precision of satellite orbit will also increase.At present, Topex, Jason-1, Jason-2 and a series of other geodetic satellites orbit calculation accuracy has reached the centimeter level, Correspondingly, the requirements of the satellite dynamics model are also getting more and more sophisticated.To take the Topex marine geodetic satellite as a background, we consider the regular movement of the satellite windsurfing board and simplify its geometry to the more common Boxing-Wing model , The sunshine pressure and light pressure moment suffered by Boxing-Wing model of Topex satellite in orbit were calculated.According to satellite attitude and orbital coupling, the effects of solar pressure and light pressure moment on the half- And satellite attitude.According to the calculation of one orbital period, the influence of light pressure on the semi-major axis of the satellite orbit is about 9 cm, and the influence on the satellite’s roll angle and pitch angle is about 6 °. Therefore, in the high-precision orbit This influence in calculation and attitude control should be considered.