HVF方法在GPS多路径效应研究中的应用

HVF METHOD AND ITS APPLICATION IN THE STUDY ON GPS MULTIPATH EFFECTS

提出了基于Helmert方差分量估计的Vondrak滤波方法(简称HVF),并将其用于GPS多路径效应的研究。通过对实际观测资料的分析表明,该方法能合理地选取Vondrak平滑因子,最大限度地削弱测量的随机误差,有效地分离观测资料序列中的信号与噪声。利用该方法提取多路径模型,并根据GPS多路径效应周期性重复的特性,可有效地削弱多路径效应对观测结果的影响,从而提高GPS定位精度。

The Vondrak filtering method based on the Helmert type variance component estimation（HVF） is presented and applied to the study on GPS muhipath effects. The experiments indicate that the method can select reasonably the smoothing Vondrak factor, reduce significantly the random error of measurement and separate successfully signal and noise. The day-to-day repeating property of GPS multipath signal can be applied to remove efficiently the muhipath disturbances in the consecutive GPS measurement, and therefore improve the quality of GPS coordinate results.