利用ECMWF和GPS估计大气可降水量  

Estimating the Precipitable Water Vapor by the ECMWF and GPS

作　　者：杨友森 YANG Yousen(Wuhan Surveying-geotechnical Research Institute Company, Limited of China Metallurgical Group, Wuhan Hubei 430000, China)

机构地区：[1]中冶集团武汉勘察研究院有限公司,湖北武汉430000

出　　处：《北京测绘》2021年第11期1417-1422,共6页Beijing Surveying and Mapping

摘　　要：河南连续运行参考系统(Continuously Operating Reference Stations,CORS)有63个测站,但仅有6个测站安装有气象传感器,而且数据极其不完整,而气象数据对于(Global Positioning System,GPS)反演水汽十分重要。针对这一问题,研究了利用欧洲中期天气预报中心(European Centre for Medium-Range Weather Forecasts,ECMWF)的再分析资料插值河南测站的气象参数和大气可降水量(Precipitable Water Vapor,PWV)。研究结果表明:插值的气压平均偏差和均方根误差在1 hpa以内,气温平均偏差和均方根误差在5 K左右;针对气温插值结果偏差稍大的问题,对插值温度进行改正,能提高50%左右的精度;将实测气象参数的GPS/PWV和无线电探空的Radio/PWV作为真值,证明了利用插值的气象参数估计河南地区GPS/PWV的精度完全满足需求,进一步提高河南CORS系统在气象方面的应用价值。The Henan CORS network has 63 stations,but only 6 stations have meteorological data and the data is extremely incomplete,with only two months of complete data in a year.Aiming at this problem,the meteorological parameters and Precipitable Water Vapor of the Henan station using the data of ECMWF were studied.The results showed that the mean pressure deviation and root mean square error of interpolation were within 1 hpa,and the mean temperature deviation and root mean square error were about 5 K.For the problem that the temperature interpolation result was slightly larger,the interpolation temperature could be corrected and was increased by 50%.The GPS/PWV of the measured meteorological parameters and the radio/PWV of the radiosonde were used as the true values,which proved that the accuracy of the GPS/PWV in Henan was fully satisfied by the interpolated meteorological parameters.And the application value of Henan CORS system was further improved in meteorology.

关 键 词：欧洲中期天气预报中心(ECMWF) 插值 气象参数 大气可降水量(PWV) 

分 类 号：P228[天文地球—大地测量学与测量工程]