基于三频GIF组合的载波相位观测精度分析

摘要

GNSS triple-frequency is advantageous in reducing observation errors,so this paper advances a new algorithm of fast carrier phase observation accuracy estimation.Based on the assumption that GNSS triple-frequency carrier observations are independent,we use sliding polynomial fitting to get the observational precision of triple-frequency carrier GIF(Geometry-Free Ionosphere-Free) combinations.GPS and BDS triple-frequency experimental data results show that the algorithm can be used to quickly estimate the triple-frequency carrier phase observation precision,so it can provide a fast and accurate random function model for single precise point positioning.%鉴于三频GNSS在削弱观测误差方面的优势,基于GNSS三频载波观测独立等精度的假设,在利用滑动多项式拟合实现三频载波无几何无电离层GIF组合观测精度快速估计基础上,研究了一种载波观测精度快速估计算法.GPS和BDS三频数据实验结果表明,该算法可实现三频载波观测精度的快速估计,为快速精密单点定位提供准确的随机函数模型.