GNSS多径反射探测海平面变化初探  

Preliminary results of sea level change monitoring with GNSS-MR

作　　者：南阳[1] 张双成[1] 张勤[1] 戴凯阳 李振宇[1] 

机构地区：[1]长安大学地质工程与测绘学院,西安710054

出　　处：《测绘科学》2015年第12期125-129,共5页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41104019;41202189;41304016)

摘　　要：随着GNSS研究与应用的不断深入,GNSS多径反射技术用于地表环境监测已成为一种新兴的遥感手段。针对目前国内对GNSS多径反射技术开展海平面变化探测研究较少的现状,该文通过分析信噪比值的变化特性,详细给出了基于信噪比观测值的GNSS多径反射技术探测海平面变化的基本原理。利用布设在美国华盛顿州Friday Harbor岸边的GPS连续运行跟踪站SC02观测数据反演了海平面变化,并与该站相距359m的Friday Harbor验潮站的监测数据进行了对比分析,误差均值为0.091m,相关系数为0.99。实验结果进一步验证了基于大地测量型GPS接收机用于海平面变化监测的有效性。The average sea level and its change have always been concerned problems in earth science and environmental science,the change of sea level will directly affect the evolution of the global weather and longtime climate,which has important significance for the unification of the global height datum.With the deepening of the research and application of GNSS,GNSS-MR based on multi-path is a new technology of remote sensing for the ground environment monitoring（vegetation,soil moisture,snow depth,sea level,volcano and so on）.Through analyzing the change of the SNR value characteristics,the basic principles of GNSS-MR technology to detect the sea level changes was given in detail.The data of SC02 which is GPS continuous tracking station layout in Friday Harbor,Washington state,United States,were used to invert the sea level changes.The retrieval result was consistent with the Friday Harbor tide station which was 359 m away from the GPS station.The mean error was 0.091 m,and the correlation coefficient was 0.99.Therefore,GNSS-MR based on the geodetic GPS receiver could be used to monitor sea level changes.

关 键 词：全球导航卫星系统 GNSS多路径反射 信噪比 海平面变化 

分 类 号：P228[天文地球—大地测量学与测量工程]