全球对流层天顶延迟特征研究  

Research on the Characteristics of the Global Zenith Tropospheric Delay

作　　者：毛健[1,2] 朱长青[1] 苏笛[2] 

机构地区：[1]南京师范大学虚拟地理环境教育部重点实验室,江苏南京210046 [2]天津师范大学城市与环境科学学院,天津300387

出　　处：《地理与地理信息科学》2012年第4期107-110,F0003,共5页Geography and Geo-Information Science

基　　金：国家自然科学基金资助项目(41071245);江苏高校优势学科建设工程资助项目

摘　　要：基于IGS提供的对流层天顶延迟数据,分析单站对流层天顶延迟特征,据此构建单站对流层天顶延迟模型,并对其进行拟合得到相关模型参数;比较模型参数与地理位置的关系,得出对流层天顶延迟与测量时间及测站地理位置的相关性,并分析其在全球范围内的连续分布情况:全球对流层天顶延迟变化具有周年性,且与测站位置和高程密切相关;其较高值多集中在赤道附近,并以赤道为中心向两侧递减。该研究为利用全球IGS站的对流层天顶延迟数据建立无需气象参数的全球对流层天顶延迟模型提供了可靠依据。It is necessary to do research on the characteristics of the global zenith tropospheric delay for building a more accuracy global zenith tropospheric delay model without meteorological parameters.Based on the precision troposphere data from IGS,this paper first analyzes the characteristics of a single station zenith tropospheric delay,and sets up the single-station zenith tropospheric delay model which is fitted to get the model parameters.Then the relationship between the model parameters and geographical location is analyzed.The analysis shows that the zenith tropospheric delay is closely related to measurement time and station location.Those results provide a reliable basis for building a more accuracy global tropospheric zenith delay model without meteorological parameters,and also gives a direction for GPS meteorology,especially the establishment of the GPS meteorological network.

关 键 词：对流层天顶延迟 特征研究 GPS气象学 

分 类 号：P228[天文地球—大地测量学与测量工程]