天津市高精度GPS地面沉降监测网数据处理中的若干技术问题探讨

On some technical problems in the data processing of Tianjin high-precision GPS ground subsidence network

本文以天津市区地面沉降GPS监测网为例,探讨了高精度GPS地面沉降监测网数据处理中的若干技术问题。研究表明,GPS数据处理软件、GPS监测网的框架基准、大气延迟改正和粗差对计算结果的精度有很大影响。在对GPS原始观测数据进行后处理时,只有对影响计算精度的各种误差源进行有效改正,GPS高程分量的精度才有可能达到毫米级,才能满足地面沉降监测的要求。

Some technical problems in the data processing of Tianjin high-precision GPS ground subsidence monitoring network are discussed taking a GPS ground subsidence network in Tianjin as an example in this paper. Studies show that GPS data processing software, GPS monitoring network frame, atmospheric delay adjustment and gross errors will bring great influence on the precision of data processing results. When implementing the GPS data post-processing, only various error sources affecting the calculating results are effectively adjusted, the elevation precision is possibly able to reach millimeter order and the requirement of monitoring the ground subsidence is able to be satisfied.