利用GPS监测地面沉降的精度分析  

Precision of subsidence measurement with GPS technique

作　　者：姜衍祥[1] 杨建图[1] 董克刚[1] 黄立人[2] 周俊[1] 于强[1] 

机构地区：[1]天津市控制地面沉降工作办公室,天津300061 [2]中国地震局第一监测中心,天津300180

出　　处：《测绘科学》2006年第5期63-65,共3页Science of Surveying and Mapping

摘　　要：为了监测天津地区的地面沉降,配合精密水准测量,1995年布设了一个GPS监测网,每年的10-11月进行一次精密GPS测量,并与同期进行的精密水准复测的垂直形变结果进行比较研究。根据1995-2004连续十年GPS大地高与精密水准测量观测数据对比研究,验证了GPS监测地面沉降的精度,从理论和实践上论证了GPS大地高变化完全可以像精密水准测量一样高精度获取水准测量点的沉降值,从而得出在地面沉降监测中GPS测量可用于监测地面沉降的结论。In order to monitor land subsidence in Tianjin area,a GPS network was established in 1995 as a complementary means of the precise leveling.The network has been observed every year from October to November since 1995,the result are compared with the ones derived from precise leveling data that are simultaneously observed with the GPS.Based on the research of successive contrast between GPS and precise leveling from 1995 to 2004,the actual precision of the two proposed method is tested.It is proved from theory and practice that land subsidence is also reflected by the value of the geodetic height's differences obtained from GPS.Then the conclusion is obtained that the GPS technology can be used in monitoring land subsidence.

关 键 词：天津地区 地面沉降 GPS 精密水准测量 精度 

分 类 号：P228[天文地球—大地测量学与测量工程]