Review of PPP-RTK:achievements,challenges,and opportunities

作     者：Xingxing Li Jiaxin Huang Xin Li Zhiheng Shen Junjie Han Linyang Li Bo Wang 

作者机构：School of Geodesy and GeomaticsWuhan University129 Luoyu RoadWuhan430079HubeiChina Technische Universitat Berlin(TUB)Straße Des 17.Juni10623BerlinGermany China Railway Siyuan Survey and Design Group Co.Ltd.WuhanChina 

出 版 物：《Satellite Navigation》 (卫星导航（英文）)

年 卷 期：2022年第3卷第3期

页      面：16-37,I0002页

核心收录：

学科分类：0810[工学-信息与通信工程] 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] 0825[工学-航空宇航科学与技术] 

基　　金：National Science Fund for Distinguished Young Scholars(Grant No.41825009) National Postdoctoral Program for Innovative Talents,China(No.BX20220239) Fundamental Research Funds for the Central Universities(2042022kf1001) Project Supported by the Special Fund of Hubei Luojia Laboratory(220100006) 

主　　题：PPP–RTK Ambiguity resolution Multi-GNSS Smart device Multi-sensor fusion 

摘      要：The PPP–RTK method,which combines the concepts of Precise of Point Positioning(PPP)and Real-Time Kinematic(RTK),is proposed to provide a centimeter-accuracy positioning service for an unlimited number of ***,the PPP–RTK technique is becoming a promising tool for emerging applications such as autonomous vehicles and unmanned logistics as it has several advantages including high precision,full flexibility,and good *** paper gives a detailed review of PPP–RTK focusing on its implementation methods,recent achievements as well as challenges and ***,the fundamental approach to implement PPP–RTK is described and an overview of the research on key techniques,such as Uncalibrated Phase Delay(UPD)estimation,precise atmospheric correction retrieval and modeling,and fast PPP ambiguity resolution,is ***,the recent efforts and progress are addressed,such as improving the performance of PPP–RTK by combining multi-GNSS and multi-frequency observations,single-frequency PPP–RTK for low-cost devices,and PPP–RTK for vehicle ***,the system construction and applications based on the PPP–RTK method are ***,the main issues that impact PPP–RTK performance are highlighted,including signal occlusion in complex urban areas and atmosphere modeling in extreme weather *** new opportunities brought by the rapid development of low-cost markets,multiple sensors,and new-generation Low Earth Orbit(LEO)navigation constellation are also ***,the paper concludes with some comments and the prospects for future research.