混合星座对BDS PPP和ZTD估计的影响分析  

Analysis on the Influences of Mixed Constellation on BDS PPP and Zenith Tropospheric Delay Estimation

作　　者：范士杰[1] 陈岩 顾宇翔 刘兆健 史航 FAN Shijie;CHEN Yan;GU Yuxiang;LIU Zhaojian;SHI hang(College of Oceanography and Space Informatics,China University of Petroleum,Qingdao 266580,China;Beidou Satellite Communications Group Co.Ltd,Beijing 100094,China)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,山东青岛266580 [2]北京北斗星通导航技术股份有限公司,北京100094

出　　处：《测绘科学技术学报》2024年第6期581-586,共6页Journal of Geomatics Science and Technology

基　　金：青岛市自然科学基金项目(23-2-1-70-zyyd-jch);山东省自然科学基金项目(ZR2019MD005);国家自然科学基金项目(41876106)。

摘　　要：针对北斗卫星导航系统BDS,研究了不同星座组合对精密单点定位PPP和天顶对流层延迟ZTD估计的影响。设计了MEO、MEO+GEO、MEO+IGSO以及MEO+GEO+IGSO等4种卫星组合方案,利用4个MGEX测站的观测数据进行了BDS静态PPP试验。结果表明:1)基于MEO卫星的BDS PPP三维位置精度最优;增加IGSO卫星可明显提高E坐标精度并缩短PPP收敛时间,但是U坐标精度略有降低。2)基于MEO卫星的BDS PPP估计的ZTD精度最优,其标准差在10 mm以内;增加GEO卫星使得ZTD估计的标准差明显增大;IGSO卫星对ZTD估计的精度影响较小。Based on the mixed constellation of BeiDou navigation satellite system(BDS),the influences of three types of BDS satellites on precise point positioning(PPP)and zenith tropospheric delay(ZTD)estimation were analyzed.Four kinds of satellite combination schemes including MEO,MEO+GEO,MEO+IGSO and MEO+GEO+IGSO were designed for BDS PPP test by using observation data from 4 MGEX stations.The results show that:1)The three⁃dimensional position accuracy of BDS PPP using MEO satellites is the best.The addition of IGSO satel⁃lites can significantly improve the accuracy of E coordinate and shorten the convergence time of PPP,but the accu⁃racy of U coordinate decreases slightly.2)The accuracy of ZTD estimated by BDS PPP using MEO satellites is the best,and its standard deviation is less than 10 mm.The addition of GEO satellites can significantly increase the standard deviation of the ZTD estimation and IGSO satellites have no contribution to the ZTD estimation of PPP.

关 键 词：混合星座 北斗卫星导航系统 精密单点定位 天顶对流层延迟 定位精度 

分 类 号：P228[天文地球—大地测量学与测量工程]