中文摘要：

采用Trimble NetR8 GPS接收机,通过高压场地试验,研究高压输电线对GPS信号的影响。结果显示：高压输电线电晕放电产生的无线电干扰不会导致GPS接收机对卫星的失锁,不会引起载波相位观测值断记。利用高次差法和双频组合双差的方法探测周跳,显示高压线不会使载波相位产生小于1周的周跳。研究认为,高压线对GPS L波段信号没有影响,建议勘选GPS基准站站址时,可适当放宽高压线距约束。

英文摘要：

We study the influence of high voltage cable on GPS signal by field experiment using Trimble Net R8 receiver. The result shows that radio interference produced by high voltage cable discharge will not lead to GPS satellite loss of lock and carrier phase broken down in the application of high precision geodetic surveying. Base on high order difference and double frequency carrier double differential phase methods, we detect GPS cycle slip and find that high voltage cable will not lead to GPS carrier phase cycle slip（less than 1 cycle）,too. It is thought that the high voltage cable has no influence on GPS L wavebands. While choosing GPS crustal deformation station site, we can relax the high voltage cable distance restrictions.