基于Hatch滤波的GPS伪距相位平滑及其在单点定位中的应用

GPS Carrier Phase Smoothing on Code Pseudorange Based on the Hatch Filter and Its Application in Point Positioning

该文首先给出了利用高精度载波相位观测值对GPS伪距观测值进行相位平滑的数学模型,分析了电离层折射误差对伪距相位平滑的影响。采用Hatch滤波实现相位平滑伪距的逐历元递推计算,并将其应用于单点定位。借助自编伪距单点定位程序,对基于Hatch滤波方法的GPS相位平滑伪距及其单点定位的精度进行了研究和验证。

Using observed value of high precision carrier phase, the mathematical model of GPS carrier phase smoothing pseudorange is given in this paper. And then the paper analyzes the effect of ionospheric refraction errors on the carrier phase smoothing. The Hatch-type filter is applied to achieve recursion calculation of carrier smoothing pseudorange epoch by epoch, and this method is used in point positioning. By the self-developed GPP program, it studies and verifies carrier smoothing pseudorange which are based on the Hatch-type filter and precision of point positioning.