高压线路对GPS接收机性能及观测数据质量影响的测试与分析

开展500kV和220kV高压输电线路对GPS观测的影响实验,发现高压输电线路产生的电磁和无线电干扰对GPS接收机内部噪声无显著影响,而GPS观测的多路径效应受高压输电线路的影响显著,并且其影响量值与电压值及与高压线的距离成正比。同时,高压输电线路对接收机捕获数据的性能、接收机钟的稳定性、观测信号L1、L2载波信噪比、观测值周跳以及基线和点位坐标的解算精度无显著影响。

Test and Analysis of the Influence of the GPS Receiver Performance and Observation Data Quality Due to High-Voltage Lines

In this paper, experiments are conducted in the area of 500 kV and 220 kV high-voltage transmission lines to research the effect of high-voltage transmission lines on GPS observations. The results show that electromagnetic interference and radio interference caused by the high-voltage transmission lines have no significant effect on the internal noise of the GPS receiver. The high-voltage transmission lines significantly impact the multipath effects. The closer to the lines and the higher the voltage, the more serious were the multipath effects. The high-voltage transmission lines have no significant effect on the ability of the GPS receiver to capture the data, the stability of the receiver clock, signal-to-noise ratio of the L1 and L2 carrier, cycle slip of the observation data, and the accuracy of calculation of the baselines and coordinates.