摘要
介绍由广播星历和精密星历解算卫星位置、速度的方法。给出了广播星历解算卫星速度的公式,推导了一种由仅包含卫星位置信息的现代精密星历内插卫星速度的方法,并利用精密星历对由广播星历计算的卫星位置、速度精度进行分析。结果表明,GPS广播星历解算的卫星位置误差小于2m,速度误差基本在0.1cm/s之内。
The methods for calculating satellite position and velocity from broadcast ephemeris and precise ephemeris are introduced. The formulation for solving satellite velocity from broadcast ephemeris is given and a method for interplating satellite velocity from modem precise ephemeris including only the information of satellite position is derived. At last, a practical example is given and the accuracy of satellite position and velocity by broadcast ephemeris is analyzed. The results indicate that the error of satellite position by broadcast ephemeris is better than 2 m, and satellite velocity is within 0.1 cm/s.
出处
《大地测量与地球动力学》
CSCD
北大核心
2010年第2期144-147,共4页
Journal of Geodesy and Geodynamics
关键词
广播星历
位置
速度
精密星历
插值
broadcast ephemeris
position
velocity
precise ephemeris
interpolation
作者简介
刘伟平，男，1986年生，硕士研究生，研究方向为卫星导航系统和惯性导航系统．E—mail：lwpchxy@sina．com
