Impact of tropospheric modelling on GNSS vertical precision:an empirical analysis based on a local active network

作     者：MªSelmira Garrido MªClara de Lacy Ana MªRojas 

作者机构：Department of CartographicGeodetic and Photogrammetric EngineeringUniversity of JaénJaenSpain Center for Advanced Studies in Earth SciencesUniversity of JaénJaenSpain Research group RNM282–Microgeodesia JaénUniversity of JaénJaenSpain 

出 版 物：《International Journal of Digital Earth》 (国际数字地球学报（英文）)

年 卷 期：2018年第11卷第9期

页      面：880-896页

核心收录：

学科分类：08[工学] 081601[工学-大地测量学与测量工程] 0816[工学-测绘科学与技术] 

基　　金：the University of Jaén in collaboration with‘Caja Rural de Jaén’(UJA2015/06/11 Project) RNM282-Microgeodesia Jaén Research Group(Junta de Andalucía)and PAI UJA 2017/19 

主　　题：Altimetry GNSS meteorological data active network tropospheric refraction 

摘      要：The troposphere affects Global Navigation Satellite System(GNSS)signals due to the variability of the refractive *** delay is a function of the satellite elevation angle and the altitude of the GNSS receiver and depends on the atmospheric *** the residual tropospheric delay is not modelled carefully a bias error will occur in the vertical *** order to analyse the precise altimetric positioning based on a local active network,four scenarios in Southern Spain with different topographical,environmental,and meteorological conditions are presented,considering both favourable and non-favourable *** use of surface meteorological observations allows us to take into account the tropospheric conditions instead of a standard atmosphere,but introduces a residual tropospheric bias which reduces the accuracy of precise GNSS ***,with short observation times it is recommended not to estimate troposphere parameters,but to use an a priori model together with the standard *** results confirm that it is possible to achieve centimetre-scale vertical accuracy and precision with real time kinematic positioning even with large elevation differences with respect to the nearest reference *** numerical results may be taken into consideration for improving the altimetric configuration of the local active network.