基于单频GPS接收机的低轨卫星准实时定轨算法研究

The Algorithm Research of Norm-real-time Orbit Determination of LEO Satellites Based on Single-frequency GPS Receiver

研究在不依赖于GPS差分基准站的情况下,利用单频GPS接收机对低轨卫星进行定轨的算法。文章先对影响卫星定轨的各种误差进行简要的分析,根据分析的结果对传统载波相位平滑伪距观测方程进行适当修正,然后,再利用修正的方程对伪距观测进行平滑,最后利用单点定位法进行轨道解算。仿真结果表明,在只需给定少数几个历元数据的情况下,利用单频接收机可以达到米级的定轨精度。

This paper studies the orbit determination of LEO satellites using GPS receivers of single frequency in condition of not depending on GPS differential reference stations. This paper analyzes the errors that influence the orbit determination firstly and corrects the measuring functions of carrier-phase-smoothingpseudorange , then uses these functions to smooth the pseudorange measurements, finally determinates the orbits of satellites using the single-point positioning method. The result of simulation indicates that the algorithm can achieve the positioning precision of meter degree with the measurements of several epochs.