顾及多因子的江苏省大气加权平均温度精化模型  

A Refined Atmospheric Weighted Mean Temperature Model Considering Multiple Factors in Jiangsu Province

作　　者：毛吉伟 MAO Jiwei(China Coal Zhejiang Mapping and Geographic Information Co.,Ltd.,Hangzhou,Zhejiang Province,311500 China)

机构地区：[1]中煤浙江测绘与地理信息有限公司,浙江杭州311500

出　　处：《科技资讯》2024年第1期162-165,共4页Science & Technology Information

摘　　要：加权平均温度(T_m)是GNSS可降水量反演过程中的关键变量。基于江苏省徐州、射阳和南京这3个探空站18a的实测探空数据(2000—2017年),对T_m与地表温度T_s、地表气压P、地表水汽压e以及地表水汽压对数形式ln e之间的相关性进行分析,采用最小二乘法构建江苏省的T_m经验模型:单因子模型T_(m1)和多因子模型T_(m2)、T_(m3)。采用2018—2019年探空数据作为对未来预测的数据,对3种本地化模型的精度进行评估。结果表明3种本地化模型的精度均高于Bevis模型,且多因子模型T_(m3)的精度高于多因子模型T_(m2)和单因子T_(m1)的精度,该模型的精度比Bevis模型提高了16.8%。Weighted mean temperature(Tm)is a key variable in the inversion process of GNSS precipitable water.Based on the measured sounding data from the 18a of the three sounding stations in Xuzhou,Sheyang and Nanjing in Jiangsu Province(2000—2017),this paper analyzes the correlation between Tm and surface temperature Ts,surface pressure P,surface vapour pressure e and the logarithmic form of surface vapour pressure lne,establishes the Tm empirical models of Jiangsu Province by using the least square method:the single-factor model Tm1 and multi-factor models Tm2 and Tm3,and evaluates the accuracy of the three localization models by using the sounding data from 2018 to 2019 as the data for future forecast.The results show that the accuracy of the three localization models is all higher than that of the Bevis model,the accuracy of the multi-factor model Tm3 is higher than that of the multi-factor model Tm2 and the single-factor model Tm1,and that the accuracy of the model is 16.8%higher than that of the Bevis model.

关 键 词：加权平均温度 探空站数据 单因子模型 多因子模型 精度评估 

分 类 号：P228.4[天文地球—大地测量学与测量工程] P412[天文地球—测绘科学与技术]