相位平滑P1码伪距及其单点定位精度分析

Accuracy research on carrier phase smoothed-P1 code pseudorange and its point positioning

针对C/A码、P1码、P2码伪距的精度问题,利用郑州J3JG站实测数据进行计算,结果表明:该站接收机产生3种伪距的精度从高到低依次为P1码、C/A码、P2码。在此基础上,利用相位观测值对精度最高的P1码伪距进行平滑,采用自编程序,对相位平滑P1码伪距的单点定位精度进行研究。实验结果表明:相位平滑P1码伪距的单点定位结果较P1码伪距的定位结果更稳定,X、Y、Z方向的平均误差和RMS值也较P1码伪距有明显提高。

The accuracy of C/A code, Pl-code and P2-code pseudorange is a puzzling problem. For the purpose of clarifying the problem, an experiment using the real observation values of zhengzhou J3JG Station is made. The resuits of the experiment indicate that the accuracy of the three kinds of pseudorang is in the order of Pl-code, C/A- code and P2-code from high level to low level. In order to improve the positioning accuracy of Pl-code pseudorange, it is smoothed by carrier phase. By the self-developed GPS point positioning program, it studies and verifies the positioning accuracy of carrier phase smoothed Pl-code pseudorange.