| 不同时空条件下RTKLib与在线PPP解算系统的ZTD精度评估 |
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| 引用本文： | 李 黎,刘 彦,王 迅,陈国栋,何琦敏,王晓明.不同时空条件下RTKLib与在线PPP解算系统的ZTD精度评估[J].大地测量与地球动力学,2023,43(1):12-17. |
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| 作者姓名： | 李 黎 刘 彦 王 迅 陈国栋 何琦敏 王晓明 |
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| 摘 要： | 基于精密单点定位(PPP)技术，分析RTKLib、CSRS-PPP、MagicGNSS和CGline四类PPP软件在不同时空条件下的对流层延迟ZTD精度。结果表明：1）4类PPP软件的ZTD精度由高到低依次为CSRS-PPP、MagicGNSS、RTKLib和CGline；2）不同地理位置下4类PPP软件的ZTD精度由高到低均为北半球、南半球和赤道；3）RTKLib-ZTD受季节影响较大，精度由高到低依次为夏季、春季、秋季和冬季，季节因素对其他在线解算系统的ZTD精度影响较小。总体而言，4类PPP软件的ZTD平均精度均优于1 cm，满足当前GNSS气象学的后处理及实时应用需求。
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| 关 键 词： | 精密单点定位 对流层延迟 RTKLib 在线解算 时间序列 |
ZTD Precision Analysis of RTKLib and Online PPP Resolution Systems Under Varied Spatiotemporal Conditions |
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| LI Li,LIU Yan,WANG Xun,CHEN Guodong,HE Qimin,WANG Xiaoming.ZTD Precision Analysis of RTKLib and Online PPP Resolution Systems Under Varied Spatiotemporal Conditions[J].Journal of Geodesy and Geodynamics,2023,43(1):12-17. |
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| Authors: | LI Li LIU Yan WANG Xun CHEN Guodong HE Qimin WANG Xiaoming |
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| Abstract: | Based on precise point positioning(PPP),we use RTKLib, CSRS, MagicGNSS and CGline to calculate the accuracy of zenith tropospheric delay(ZTD) under different spatiotemporal conditions. The results show that: 1) The ZTD accuracy of four PPP softwares are CSRS-PPP, MagicGNSS, RTKLib and CGline from highest to lowest. 2) Under different geographical locations, the ZTD accuracy of four PPP softwares from high to low is northern hemisphere, southern hemisphere and equator. 3) The RTKlib-ZTD is greatly affected by seasons, and the RMSE are summer, spring, autumn and winter from highest to lowest, while different seasons have little influence on the ZTD of other online solution systems. In general, the average ZTD RMSE of four PPP softwares are better than 1 cm, which meets the current application of real-time and post-processing GNSS meteorology. |
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| Keywords: | PPP ZTD RTKLib online resolution time series |
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