参数设置对高精度GPS数据解算的影响探讨  

Discussion on effects of different parameter settings on high-precise GPS data solution

作　　者：李星光[1] 郑南山[1] 

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《测绘科学》2015年第1期33-37,51,共6页Science of Surveying and Mapping

基　　金：国家科技支撑计划课题项目(2012BAJ22B01);江苏高校优势学科建设工程项目(SZBF2011-6-B35)

摘　　要：在高精度GPS数据处理过程中,如何满足解算精度的要求并获取理想的可降水量估值值得研究。文章以GAMIT软件不同参数设置及气象数据的使用为解算方案,并以香港卫星定位参考站数据作为实例分析,结果表明:从基线解算精度角度,对流层天顶延迟参数设置及有无气象数据参与对解算精度影响很小,有利于利用GAMIT软件获取更高时间分辨率气象参数;从气象角度上,在对流层延迟参数估计时间间隔发生变化时,可降水量也会受到一定的影响,且在有实测气象数据参与解算时,其影响对天气变化比较敏感;在正常天气状况下,无气象数据参与解算对可降水量估值影响不大,基本可满足气象业务需求;在天气发生变化(降水)情况下,实测气象数据的使用与否对可降水量解算影响比较显著。In the high-precision GPS data processing,it is important to meet the accuracy requirements and obtain the desired precipitation estimates.In this paper,by changing different parameter settings of GAMIT and using meteorological data,and taking the Hong Kong Satellite Positioning Reference Station data as the example,it showed that：from the perspective of baseline solution precision,tropospheric zenith delay parameters and the presence of meteorological data would have little effect on accuracy participation processing,and which is good for GAMIT to obtain meteorological parameters of higher time resolution;from the perspective of meteorology,when tropospheric delay parameter estimation interval changes,the precipitable water vapor would be affected,and it would have great impact on weather change as meteorological data involved in processing;under normal weather conditions,non-meteorological data involved in processing would have little affect on the valuation of precipitation,which could meet the basic needs on meteorological services;under the bad weather（precipitation）,the meteorological data involved in processing or not would have more significant influence on the precipitable water vapor.

关 键 词：控制参数 降水量估值 GAMIT 气象数据 

分 类 号：P228[天文地球—大地测量学与测量工程]