高阶电离层延迟对PPP-AR对流层参数估计的影响  

The effects of higher-order ionospheric delay on precise point positioning ambiguity resolution tropospheric parameters estimation

作　　者：张兵良[1,2] 方卓 王立诗云 李珊珊 ZHANG Bingliang;FANG Zhuo;WANG Lishiyun;LI Shanshan(College of Public Administration,Nanjing Agricultural University,Nanjing 210095,China;Nanjing Shuwei Surveying and Mapping Co.,Ltd.,Nanjing 211808,China;Nanning Survey and Design Institute Co.,Ltd.of China Railway Siyuan Group,Nanning 430007,China)

机构地区：[1]南京农业大学公共管理学院,南京210095 [2]南京数维测绘有限公司,南京211808 [3]中铁四院集团南宁勘察设计院有限公司,南宁430007

出　　处：《测绘科学》2024年第4期57-64,共8页Science of Surveying and Mapping

基　　金：国家自然科学基金面上项目(42271106)。

摘　　要：针对高阶电离层(HOI)延迟对精密单点定位模糊度固定(PPP-AR)对流层参数估计的影响。该文使用了香港卫星定位参考网(SatRef)的16个连续运行参考站(CORS)测站的观测数据估计了对流层参数,并分析不同电离层环境HOI延迟的影响。实验结果表明,太阳风暴和地磁风暴活动期间,HOI延迟对PPP-AR对流层天顶湿延迟(ZWD)最大影响达到4.03 mm,南北梯度相比东西梯度更易受到HOI延迟的影响。实验结果进一步表明,通过GPS/Galileo PPP-AR可以显著降低HOI延迟对ZWD,南北梯度和东西梯度的影响,均方根(RMS)值分别降低了17%,15%,21%。This paper investigates the impact of high-order ionospheric(HOI)delays on the estimation of tropospheric parameters in precise point positioning ambiguity resolution(PPP-AR).The study utilizes observation data from 16 continuously operating reference stations(CORS)of the Satellite Positioning Reference System in Hong Kong(SatRef)to estimate tropospheric parameters and analyze the effects of different ionospheric environments on HOI delays.The experimental results indicate that during periods of solar wind and geomagnetic storm activity,HOI delays have a maximum impact of 4.03 mm on the tropospheric zenith wet delay(ZWD)in PPP-AR,with the impact being more pronounced on the north-south gradient compared to the east-west gradient.Furthermore,the experimental results further demonstrate that through(global positioning system)GPS/Galileo satellite navigation system(Galileo)PPP-AR can significantly reduce the impact of HOI delays on ZWD,with reductions in root mean square(RMS)values of 17%,15%,and 21%for the north-south gradient and east-west gradient,respectively.

关 键 词：高阶电离层延迟 精密单点定位模糊度固定 天顶湿延迟 梯度 

分 类 号：P228.4[天文地球—大地测量学与测量工程]