GTm_X: anew version global weighted mean temperature model

• 作 者: PengChen;WanqiangYao;
• 机 构: College of Geomatics,Xi'an University of Science and Technology,Xi'an 710054,China
• 出 处: 第六届中国卫星导航学术年会
• 发表日期: 2015年期

　　The atmospheric weighted mean temperature (Tm) determines the calculation accuracy of perceptible water value.Recently,a variety of global Tmempirical formulas and models have been developed using different databases,which have defects of limited spatial resolution.To address this issue,we establish a high-resolution global Tmmodel,GTm_X,using global reanalysis data in 2011– 2013 provided by the ECMWF.GTm_X achieves a global spatial resolution of 1° × 1°.Its accuracy is verified using 2011–2013 Tm data from 703 global radiosonde stations.GTm_X exhibits higher accuracy than Bevis’s formula and other empirical models currently in use,including GTm_Ⅲ,and GTm_N.