COMPASS系统GEO卫星太阳光压模型精化技术研究

项目名称： COMPASS系统GEO卫星太阳光压模型精化技术研究

项目编号： No.41204022

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 地球物理学和空间物理学

项目作者： 郭睿

作者单位： 中国人民解放军61081部队

项目金额： 25万元

中文摘要： GEO卫星是COMPASS系统的重要组成部分，其轨道测定与预报是导航服务性能的根本保证。对于亚米级定轨，光压摄动是主要误差源，是制约轨道预报精度的关键因素。COMPASS系统尚处研制阶段，其定轨借鉴了GPS光压模型，试验表明该模型并不完全适用于COMPASS系列卫星，尤其是GEO卫星。课题针对该问题，研究利用长期的各类型测轨数据，特别是所有卫星均有的、独具特色的星地时间同步与SLR数据，完成GEO卫星光压模型的设计与精化。采用小波分析法研究GPS光压模型在COMPASS系统中的应用特性，论证定轨与光压模型之间的精度关系；研究设计适合卫星平台特性的光压模型和参数表达形式，推导模型参数的法方程和参数估计方法；综合伪距、转发式测距、SLR和星地钟差等数据，完成短弧精密定轨，研究长弧精密轨道的平滑方法，并利用得到的2-4年精密轨道，估计不同卫星的模型系数，采用实测数据完成光压模型精度评估与验证。

中文关键词： 卫星导航；精密定轨；地球同步轨道卫星；太阳光压；时间序列

英文摘要： Geosynchronous earth orbit(GEO) satellites play a significant role in the COMPASS navigation system, and the errors of satellite ephemeris and clock corrections restrict the service performance of navigation system. The largest eror in sub-meter level precision orbit determination(POD) is due to the effect of solar radiation pressure(SRP), which is much larger than the MEO satellite. As being the constructing and developping phase, the GPS SRP models have been introduced in the COMPASS system. POD experiments show that the middle period and long period predicting precision need being improved. We are aiming at establishing and improving the SRP model precision for the COMPASS high orbit satellites in this project. Several kinds of observations will be employed, such as the L-band pseudoranging data, the C-band transfer ranging data, and the SLR data so on and so force. As the satellite clock offsets are obtained by the satellite-earth wireless two-way method, which could also be employed in this project. Firstly the reflectance of SRP model will be analysed both in the single and multiple POD mode, and the series characteristic will be extracted and analyzed with the wavelet method, in order to check applicability of the GPS SRP model in the COMPASS system. Relationships between the POD precision and the modell

英文关键词： satellite navigation；precise orbit determination；GEO；solar radiation pressure；time series