摘要
GPS信号模拟器模拟产生GPS接收机前端接收到的卫星信号,其中需要确定的关键参数是GPS卫星的6个轨道参数。通过对地球引力场的摄动力进行分析,本文研究了作用于卫星上的力以及GPS卫星的运行规律,通过公式推导得出了利用某一时刻卫星轨道信息计算任意时刻卫星6个轨道参数的算法,并通过Matlab仿真分析不同轨道面的GPS星座分布、卫星地迹随时间的变化规律和GDOP值,从而验证了计算得到的卫星轨道参数满足模拟器的设计及性能要求。
GPS signal simulator simulates the satellite signals obtained by GPS, and the six orbital elements of GPS satellite are important parameters in GPS signal simulator. Through analyzing the forces acting on satellites, the research of the rules of the satellite motion is presented in this paper. Through some formula derivation, an algorithm of computing for the six orbital parameters at any time is proposed using the satellite orbital information. After the simulating by Matlab to analyze the GPS location in different orbital, the change rule of satellite followed by time, and the value of GDOP, the parameter got from the algorithm can meet the demand of simulator design.
出处
《电子测量技术》
2007年第7期112-114,共3页
Electronic Measurement Technology
关键词
模拟器
轨道参数
非球形地球引力
GPS
simulator
orbital elements
non-central gravitational force
GPS
