相位平滑伪距差分技术在北斗定位中的应用探讨

为提高北斗卫星导航系统的定位精度和稳定性,研究载波相位平滑伪距差分定位技术。推导伪距差分和载波相位平滑伪距的Hatch公式,利用实测的北斗数据进行单频和双频载波相位平滑伪距,将平滑后的伪距用于差分定位,并对实测数据进行算法验证。结果表明:经过载波相位平滑后的北斗码伪距定位精度和稳定性,较未平滑的数据可得到明显改善;北斗卫星导航系统的相位平滑伪距差分技术定位精度可达到其在GPS应用中的同等效果,无明显差距。

Application of Phase Smoothing Pseudorange Differential Technology in Beidou Positioning

In order to improve the positioning accuracy and stability of the beidou satellite navigation system,studying the carrier phase smoothing pseudorange differential positioning technology, the formula of pseudorange difference and the Hatch formula of carrier phase smoothing pseudorange was derived, using the measured data of Beidou to smooth the single frequency and dual-frequency carrier phase pseudorange, then , the smoothed pseudorange were used to start differential positioning, and the algorithm have been carried out to verify the measured data. The result shows that the pseudorange of Beidou which have been smoothed become more accuracy and stability then those have not ;the localization accuracy of Beidou satellite navigation system of phase smoothing pseudorange differential technology can achieve the same effect as in the GPS application, there is no obvious difference between them.