导航卫星历书参数拟合改进算法  

The Improved Method on the Almanac Parameters Fitting of Navigation Satellites

作　　者：陈刘成[1,2] 唐波 梁红梅 

机构地区：[1]解放军61081部队,北京100094 [2]中国科学院上海天文台,上海200030

出　　处：《天文学进展》2008年第1期80-86,共7页Progress In Astronomy

基　　金：地球空间环境与大地测量教育部重点实验室测绘基础研究基金资助课题(07-06)

摘　　要：该文对导航卫星历书拟合问题进行了综合研究,结合J_2项分析解,提出了一种新的卫星历书拟合方法和用户算法。该方法只需下列参数表示历书:Week、T_(oa)、a、e、i、Ω_0、ω0、M_0,比正常的GPS卫星历书参数少一个:Ω。用户算法可以根据一阶摄动理论,由新历书参数a、e、i计算Ω,并对MEO、IGSO、GEO卫星的历书参数近地点角进行改进。通过多组模拟轨道和IGS精密轨道的历书拟合实验,结果表明采用新方法具有参数少、计算量少、迭代收敛快、拟合MEO卫星历书精度高等优点,同样适用于高轨GEO、IGSO卫星。Based on the 1st order perturbation analytic solution theory, the improved almanac parameters fitting method of navigation satellites and its user calculation algorithm are introduced in this article. Compared with the normal GPS almanac, less parameters, only eight, as“Week, Toα, a, e, i, Ω0, ωo, M0”, are needed to express the new almanac information. According to the broadcasting almanac parameters a, e, i, the user can calculate Ω2, ω1 by formulas directly. The user of the new almanac will get more precise satellite position by correcting the ωk at any epoch. Using the new method, almanac fitting examples on simulated satellite orbits and IGS GPS precise orbits are shown. The new method can obtain higher accuracy orbits for MEOs, with less parameters and quicker convergence through iterative calculation. It is the same with high orbit satellite GEO/IGSO.

关 键 词：天体测量学 卫星导航 历书 用户测距误差 

分 类 号：P228[天文地球—大地测量学与测量工程]