超高层建筑GPS动态监测中对流层延迟处理方法研究

摘要

GPS动态监测超高层建筑物时,由于监测站和基准站高差较大,对流层湿延迟不能较好地通过传统的双差模式进行消除.本文采用基于随机游走过程的参数估计法对双差残余对流层延迟进行进一步削弱,并介绍相应的数据处理方法.实验结果表明,超高层建筑在进行GPS监测时对流层延迟残余误差不可忽略,卫星高度角越低相应延迟量越大;通过该方法进行估计改正,提高了实时动态监测精度,尤其是在高程方向的改善较为明显.%In conducting dynamic monitoring for high-rise buildings using GPS technology,due to large height difference between base and rove stations,the tropospheric wet delay cannot adequately be eliminated by double difference mode.In this paper,a parameter estimation method based on random walk is used to further weaken the residual tropospheric delay.The corresponding data processing method is introduced in this paper.The experimental results show that the residual error of tropospheric delay cannot be ignored with dynamic monitoring for super high-rise building using GPS technology.Furthermore,the residual error of tropospheric delay is strongly dependent on satellite elevation,with the estimation and deduction for residual tropospheric delay relative to the traditional RTK positioning.The method introduced in this paper improves the real time dynamic monitoring precision for super high-rise buildings,especially if the elevation difference is more obvious.