摘要
根据GPS ICD文档中定义的一组18参数广播星历模型及其用户算法推导了三维坐标对各参数的偏导数表达式,建立了18参数和卫星位置矢量之间的线性函数模型,利用最小二乘平差原理计算北斗卫星18参数广播星历,分别通过北斗卫星定轨数据对算法进行测试,结果验证了算法的正确性,同时证明在4小时之内,拟合误差优于0.01 m。
The GPS ICD document defined a new group of 18 parameters broadcast ephemeris model, according to the user algorithm of this new parameter model, the partial derivative expression of each parameter is derived, and the linear function model is established between the 18 parameters and satellite position vector. In order to test this algorithm, the Beidou satellite orbit determination data are used to calculate the 18 parameters of Beidou satellite broadcast ephemeris by the principle of leastsquares adjustment. The result verified the correctness of the algorithm, and simultaneously proved 4 hours fitting error is better than 0.01 m.
Key words： Beidou satellite
出处
《大地测量与地球动力学》
CSCD
北大核心
2013年第5期71-74,78,共5页
Journal of Geodesy and Geodynamics
关键词
北斗卫星
用户算法
拟合分析
GPS
ICD文档
18参数广播星历模型
Beidou satellite
user algorithmbroadcast ephemeris parameter
fitting analysis
GPS ICD document
18 parameters broadcast ephemeris model
