PPP与GAMIT/TRACK在地震监测中的应用  

Application PPP of and GAMIT/TRACK module in earthquake monitoring

作　　者：范士杰[1,2,3,4] 刘焱雄[3] 张健[3] 

机构地区：[1]武汉大学测绘学院,武汉430079 [2]中国石油大学地球科学与技术学院,山东青岛266555 [3]国家海洋局第一海洋研究所,山东青岛266061 [4]海岛(礁)测绘技术国家测绘局重点实验室,山东青岛266510

出　　处：《测绘科学》2013年第2期184-186,共3页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41274011);海岛(礁)测绘技术国家测绘局重点实验室资助项目(2010B03)

摘　　要：本文基于非差精密单点定位(PPP)和双差定位模式,采用研制的UNIP软件和GAMIT/TRACK运动学分析模块,对GPS技术在地震监测中的应用进行研究。利用IGS不同精度和时延的星历和钟差产品,分析了卫星轨道和钟差对两种软件动态定位结果的影响;采用不同的数据处理方案,分别提取GPS同震地表形变信息。结果表明:GAMIT/TRACK模块精密动态定位的实时性,更适用于地震等突发事件中的GPS快速响应;如果能够提供精确的卫星钟差,UNIP软件的高程精度明显优于GAMIT/TRACK模块,技术将更显优势。Based on Precise Point Positioning （PPP） and double difference positioning models, the application of developed UNIP software and GAMIT/TRACK module in earthquake monitoring were researched in the paper. Using IGS satellite ephemeris and clock products of different precision and delay, the influences on GPS kinematic positioning of satellite orbit and clock offset were analyzed. With different data processing scheme, this paper extracted co-seismic surface deformation information. The results showed that the re- al-time of precise kinematic positioning with GAMIT/TRACK is more applicable for earthquake emergency and GPS fast responses. If accurate satellite clock offset could be provided, the elevation precision with UNIP is obviously better than GAMIT/TRACK module, and Precise Point Positioning （PPP） technology would show more advantage.

关 键 词：精密单点定位 双差定位 地震监测 精密星历和钟差 

分 类 号：P228[天文地球—大地测量学与测量工程]