首先对GPS卫星的轨道定轨的原理进行了简单描述,以卫星的广播星历数据为基础,计算出卫星的16个轨道参数,进而得到该卫星任一时刻的瞬时坐标.以2017年4月7日的GPS07号卫星的广播星历数据为例,计算该GPS卫星当天的轨道坐标,并将结果与当天IGS提供的精密星历所提供的卫星轨道坐标进行比较,计算结果显示广播星历误差可达5 m.最后使用STK软件调用MATLAB软件读取数据进行仿真分析,模拟出卫星的轨道,并计算出卫星的坐标,数值结果可为轨道设计提供技术参考.%Firstly, the article briefly describe the principle of orbit determination of GPS satellites . Based on the satellite ephemeris data, the 16 orbital parameters of the satellite are calculated, and then the instantaneous coordinates of the satellite are obtained. Tak-ing the broadcast ephemeris data of GPS07 satellite on April 7, 2017 as an example, the orbital coordinates of the GPS satellite are calculated and compared it with the satellite orbit coordinates provided by the precise ephemeris provided by IGS. Show broadcast e-phemeris error of up to 5 m. Finally, we use STK software to call MATLAB software to simulate the data, simulate the orbit of satel-lite, and calculate the satellite coordinates, the last numerical results can provide technical reference for track design.
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