基于车载移动测量的GNSS定位方法

摘要

In order to solve the problem of vehicle-borne mobile measurement with high frequency and high accuracy,this paper introduces the method of solving the dynamic difference of carrier phase by using GPS, Beidou and GLONASS satellite navigation systems.In this paper, the double-difference wide-lane observation equation is composed of double-frequency observations, The M-W combination is used to find the float wide-lane ambiguity with high accuracy,and then the ambiguity of the wide-lane is fixed.Then, the basic ambiguity of the carrier double-difference is fixed.Finally, the fixed ambiguity is substituted into the carrier equation, using least squares solution station coordinates.In this paper, this method is used to calculate the measured GPS data, and finally to get the centimeter level positioning result.%针对车载移动测量需要高频高精度的动态差分定位解算的问题,文中介绍利用GPS、北斗、GLONASS三个卫星导航系统进行载波相位动态差分的解算方法.首先利用双频观测值组成双差宽巷观测方程,利用M-W组合求出较高精度的宽巷模糊度浮点解,然后对宽巷模糊度进行搜索固定;接着对载波双差的基础模糊度进行搜索固定;最后将固定的模糊度代入载波相位双差观测方程,利用最小二乘求解测站坐标.文中使用该方法对车载GNSS实测数据进行解算,最终可得到厘米级别的定位结果.