北斗卫星太阳光压解析模型建立及应用

光压模型是导航卫星高精度定轨、定位的基础。目前关于北斗卫星光压摄动模型的研究并不少见,但基于卫星物理参数的综合解析模型建立与应用公开可见的论述并不多见。不同于其他保守和非保守摄动力,光压辐射与卫星本身参数状态密切相关,具有明显的个体差异性。本文基于光压辐射的物理机理、北斗卫星物理参数、姿态控制模式等,建立光压摄动综合解析模型,以精密星历和激光测距数据为基准,验证了综合解析模型能够获得分米级的精密定轨精度。在此基础上,根据卫星角动量守恒和在轨遥测参数变化,分析了综合解析模型和在轨实际干扰力的差值,提出了在综合解析模型基础上增加常数经验修正项Da、Ya的方法,以北斗C08、C10星为例,分别可获得0.078、0.084 m的SLR检核精度,相比于利用CODE经验改进模型,精度分别提高0.021、0.045 m。

Solar radiation pressure modeling and application of BDS satellite

Solar radiation pressure (SRP) model is the basis of high precise orbit determination and positioning of navigation satellites. At present, it is not uncommon for the study of SRP model of BDS satellite. However, the establishment and application of comprehensive analytical SRP model based on satellite physical parameters are rare. Different from other conservative force and non-conservative force, SRP is closely related to the satellite's physical parameters and in-orbit state, which has obviously individual differences. On the basis of the physical mechanism of solar radiation, BDS satellite physical parameters, in-orbit attitude control mode, and so on, comprehensive analytical model has been modeled in this paper. Based on precise ephemeris and laser ranging data, the precision of comprehensive analytical model has been verified. And the precision of orbit determination is decimeter using this comprehensive analytical SRP model. According to the satellite conservation theorem of angular momentum and change of in-orbit telemetry parameters, the difference between comprehensive analytical model and actual in-orbit interference force has been analyzed and calculated. The addition of empirical items on the comprehensive analytical model has been proposed in section 4. Taking C08, C10 satellite of BDS as an example, the precision of satellite laser ranging (SLR) checking precision of them is 0.078 m and 0.084 m respectively. Compared with using the improved CODE empirical model, precision orbit accuracy of them has increased by 0.021 m and 0.045 m respectively.