对流层天顶延迟改正模型对精密单点定位的影响  

Influence of Zenith Tropospheric Delay Estimation Model for Precision Point Positioning

作　　者：强美巧 管庆林 王禹兮 孙萍[1] 邱伟伟 樊春明[1,2] QIANG Meiqiao;GUAN Qinglin;WANG Yuxi;SUN Pin;QIU Weiwei;FAN Chunming(College of Geography and Oceanography,Minjiang University, Fuzhou, Fujian 350108, China;Institute of Satellite Navigation and Space Information Engineering, Minjiang University, Fuzhou, Fujian 350108, China)

机构地区：[1]闽江学院地理与海洋学院,福建福州350108 [2]闽江学院卫星导航与空间信息工程研究院,福建福州350108

出　　处：《闽江学院学报》2022年第2期110-117,共8页Journal of Minjiang University

基　　金：闽江学院“校长基金”项目(103952020077);闽江学院科技项目(MYK21010)。

摘　　要：针对不同对流层延迟改正模型对精密单点定位(PPP)性能影响不同的问题,利用多模全球卫星导航系统(GNSS)实验网(MGEX)8个测站的实测数据,从高程和季节方面对比分析了不同对流层延迟改正模型时PPP的定位性能。实验结果表明:采用Saastamoinen模型改正对流层延迟误差时,PPP性能受海拔和季节因素影响,高海拔和春秋季节时的PPP性能优于低海拔和夏冬季节。用天顶对流层延迟(ZTD)参数估计模型改正对流层延迟误差时,PPP性能受高程和季节因素影响较小,可获得5 cm左右的PPP精度且收敛时间优于30 min。相较于采用Saastamoinen模型改正时20 cm左右的PPP精度和超过60 min的收敛时间,采用ZTD参数估计模型时PPP的精度和收敛速度分别提升了66%和61%。The accuracy and convergence time of PPP is affected by the tropospheric delay correction method.In this paper,the accuracy and convergence time of PPP with different tropospheric delay correction method were compared and analyzed in terms of height and season using the observations from 8 stations of the MGEX.The experimental results indicated that the PPP performance is affected by the height and season when the tropospheric delay error was corrected by Saastamoinen model,the PPP performance was better at high altitude and in spring and autumn than at low altitude and in summer and winter.When the ZTD parameter estimation model was used to correct the tropospheric delay error,the PPP performance was less affected by the elevation and seasonal factors,and a positioning accuracy of approximately 5 cm was obtained with a convergence time better than 30 min.The accuracy and convergence time were improved by 66%and 61%,respectively,compared with the accuracy of about 20 cm and the convergence time over 30 min when the Saastamoinen model was used to correct the tropospheric delay error.

关 键 词：对流层延迟误差 对流层改正模型 精密单点定位 全球定位系统 

分 类 号：P222.81[天文地球—大地测量学与测量工程]