对流层湿延迟估计方法对PPP数据处理的影响  

Effect of the Troposphere Zenith Delay Estimation Method on Precise Point Positioning

作　　者：李盼[1] 李星星[1] 王磊[1] 陈远 

机构地区：[1]武汉大学测绘学院,武汉市珞喻路129号430079 [2]广东省航道利用外资项目管理办公室

出　　处：《武汉大学学报（信息科学版）》2010年第7期850-853,共4页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(40874017);国家创新研究群体科学基金资助项目(40721001);国家973计划资助项目(2006CB701301)

摘　　要：设计4种实验方案分析了对流层延迟参数估计方法对PPP数据处理的影响。结果表明,采用分段线性方法估计天顶湿延迟比分段常数方法估计得到的天顶湿延迟、定位结果精度略高;静态PPP解算得到的天顶对流层湿延迟优于5 mm,高程方向的定位精度可达1 cm左右;动态PPP定位精度略低,高程方向可达2cm左右。同时,考虑对流层湿延迟水平梯度在一定程度上能改善PPP的处理结果。In this paper,the effect of troposphere zenith delay estimation method on PPP data processing is studied.The results show that the horizontal gradient consideration can improve PPP precision to some degree.ZWD estimation with piece wise linear method is more or less better than with the piece wise constant method.If the piece wise linear method is adopted and the horizontal gradient is considered at the same time,ZWD estimation from static PPP is better than 5 mm.The horizontal accuracy is at the level of millimeter.The vertical accuracy reaches 1cm.To the accuracy of kinematic PPP,the horizontal accuracy is about 1cm and the vertical accuracy is about 2 cm.

关 键 词：对流层湿延迟 精密单点定位 分段常数 分段线性 水平梯度 

分 类 号：P228.41[天文地球—大地测量学与测量工程]