云南地基GPS水汽解算方案及精度检验  

Calculation scheme and accuracy test of ground-based GPS atmospheric water vapor in Yunnan

作　　者：孙绩华[1,2] 吴萍[3,4] 刘建宇[1] 

机构地区：[1]云南省气象科学研究所,昆明650034 [2]大理国家气候观象台,大理671003 [3]南京信息工程大学气象灾害省部共建教育部重点实验室,南京210044 [4]高淳县气象局,南京211300

出　　处：《南京信息工程大学学报（自然科学版）》2013年第2期106-112,共7页Journal of Nanjing University of Information Science & Technology（Natural Science Edition）

基　　金：公益性行业(气象)科研专项(GY-HY201006054;GYHY201006009);国家自然科学基金(41275095);云南省省院省校科技合作计划(2006YX39)

摘　　要：在分析GAMIT水汽解算方案特点的基础上,利用云南6站地基GPS水汽探测资料,进行了不同解算方案计算结果的分析,并与GPS探空资料的PWV值进行比较,结果显示:不同解算方案对云南地基GPS水汽反演结果有显著的影响;在进行本地化后,GAMIT软件包对云南GPS水汽反演的精度有显著提高;不同季节的云南地基GPS反演水汽值与高精度探空水汽值的数值和变化趋势极为一致,二者的均方根差小于2mm,说明该解算方案的地基GPS水汽反演结果可用.Based on the analysis of the characteristics of atmospheric water vapor calculation scheme processed by GAMIT software, the results generated by two kinds of different calculation schemes are comparatively analyzed by using the ground-based GPS data of 6 meteorological stations in Yunnan province. The analysis and accuracy test are conducted by comparison with the radiosonde data. The results show that the two calculation schemes are quite dif- ferent in the retrieved water vapor results. The precision of GPS water vapor is obviously improved after adopting the local model. The water vapor values derived from GPS are roughly in agreement with the radiosonde observations with a mean-root-square error less than 2mm, and the changing trends of them are basically the same. The study re- vealed that the retrieved water vapor generated by the ground-based GPS calculation scheme in the local model can be used in research business.

关 键 词：GPS观测 GAMIT软件 水汽总量 精度检验 

分 类 号：P458.121.1[天文地球—大气科学及气象学]