北京测绘2024，Vol.38Issue(6)：857-861,5.DOI:10.19580/j.cnki.1007-3000.2024.06.006
中国区域Tm与纬度、海拔的线性分析及模型研究
Linear analysis of Tm with latitude and altitude in China and model research
摘要
Abstract
The traditional Bevis model has system errors and low accuracy in China. Therefore,a Tm multi-factor regression model added with the latitude and altitude parameters of stations was proposed. Based on the observation data from 70 sounding stations in China,firstly,the variation of the correlation coefficients of Tm,latitude φ,and altitude h with time was investigated,and the variation of the linear fitting coefficients k and b of Tm,latitude φ,and altitude h with time was studied,respectively.Then,based on the Tm-Ts single-factor regression model,latitude and altitude parameters were added,and the fitting coefficient was expressed by the day of year(DOY).The Tm multi-factor regression model of the Chinese region was obtained.Finally,the verification was conducted using sounding data from 2018.The results indicate that the model greatly weakens the system error and improves the accuracy by 19.8％,indicating its higher practicality in China.关键词
加权平均温度(Tm)/线性分析/大气水汽含量(PWV)/温度模型/多因子回归模型Key words
weighted mean temperature/linear analysis/precipitable water vapor/temperature model/multi-factor regression model分类
天文与地球科学引用本文复制引用
刘键,王庆,聂檄晨,朱理想,李佳佳..中国区域Tm与纬度、海拔的线性分析及模型研究[J].北京测绘,2024,38(6):857-861,5.基金项目
南京市测绘勘察研究院股份有限公司科研项目(2019RD09) （2019RD09）
