GPS测量地面沉降的可靠性及精度分析

ANALYSIS ON RELIABILITY AND ACCURACY OF SUBSIDENCE MEASUREMENT WITH GPS TECHNIQUE

根据对1995～2004连续10年的GPS大地高与精密水准测量数据的对比研究，验证了两种方法的实际精度，结果表明：GPS大地高变化完全可以像精密水准测量一样高精度地获取水准测量点的沉降值，可用于地面沉降监测。

On the basis of the research on the contrast between GPS and precise leveling from 1995 to 2004, the actual accuracy of the two methods is tested. It is proved the value of the geodetic height＇s differences obtained from GPS. used in monitoring land subsidence. that land subsidence is also reflected by Therefore the GPS technology can be used in monitoring land subsidence.