基于北斗卫星的GPS轨迹数据异常双频定位方法

Research on abnormal dual-frequency positioning method of GPS trajectory data based on Beidou satellite

摘要:

当前GPS轨迹定位方法均采用单频定位，在数据异常情况下不能保障定位精度，故此提出一种基于北斗卫星的GPS轨迹数据双频定位方法研究。先基于北斗卫星的定位原理建立用于空间几何距离测量和地面监测点精准定位的数学模型，并确定出伪距和载波相位的观测值的权重；利用北斗卫星确定出标的物的空间几何距离，及空间位置信息；由于定位系统本身及大气电离层的影响，得到空间定位信息内包含有误差项，基于北斗卫星系统可以修正GPS轨迹误差项和异常数据，实现对标的物位置信息的精准定位。测试数据表明提出定位方法的精度更高，综合定位偏差值为0.56%，同时定位误差的均值和方差控制表现更好。

Abstract:

The current GPS trajectory positioning methods all use single-frequency positioning, which can not guarantee the positioning accuracy under the abnormal data. Therefore, a research on the dual-frequency positioning method of GPS trajectory data based on Beidou satellite is proposed. Firstly, based on the positioning principle of Beidou satellite, a mathematical model for spatial geometric distance measurement and accurate positioning of ground monitoring points is established, and the weights of the pseudorange and carrier phase observation values are determined. The Beidou satellite is used to determine the spatial geometric distance of the object. And spatial position information; due to the influence of the positioning system itself and the atmospheric ionosphere, the spatial positioning information contains error terms. Based on the Beidou satellite system, the GPS trajectory error term and abnormal data can be corrected to achieve accurate positioning of the target position information. The test data shows that the accuracy of the proposed positioning method is higher, the comprehensive positioning deviation is 0.56%, and the mean and variance control of the positioning error is better.