Positioning accuracy assessment for the 4GEO/5IGSO/2MEO constellation of COMPASS

作     者：ZHOU ShanShi CAO YueLing ZHOU JianHua HU XiaoGong TANG ChengPan LIU Li GUO Rui HE Feng CHEN JunPing WU Bin 

作者机构：Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Beijing Global lnformation Application and Development CenterBeijing 100094China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2012年第55卷第12期

页      面：2290-2299页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 080802[工学-电力系统及其自动化] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：supported by the Shanghai Committee of Science and Technology(Grant No.11ZR1443500) the National Natural Sciences Foundation of China(Grant Nos.11033004 and 11203009) China Satellite Navigation Conference(Grant No.CSNC2011-QY-01) 

主　　题：PPP real-time positioning authorized services orbit determination 

摘      要：Determined to become a new member of the well-established GNSS family,COMPASS(or BeiDou-2) is developing its capabilities to provide high accuracy positioning *** positioning modes are investigated in this study to assess the positioning accuracy of COMPASS 4GEO/5IGSO/2MEO *** Point Positioning(PPP) for geodetic users and real-time positioning for common navigation users are *** evaluate PPP accuracy,coordinate time series repeatability and discrepancies with GPS precise positioning are *** show that COMPASS PPP repeatability for the east,north and up components of a receiver within China s Mainland is better than 2 cm,2 cm and 5 cm,*** systematic offsets of several centimeters exist between COMPASS precise positioning and GPS precise positioning,indicating errors remaining in the treatments of COMPASS measurement and dynamic models and reference frame differences existing between two *** common positioning users,COMPASS provides both open and authorized services with rapid differential corrections and integrity information available to authorized *** assessment shows that in open service positioning accuracy of dual-frequency and single-frequency users is about 5 m and 6 m(RMS),respectively,which may be improved to about 3 m and 4 m(RMS) with the addition of differential *** accurate Signal In Space User Ranging Error(SIS URE) and Geometric Dilution of Precision(GDOP) contribute to the relatively inferior accuracy of COMPASS as compared to *** the deployment of the remaining 1 GEO and 2 MEO is not able to significantly improve GDOP,the performance gap could only be overcome either by the use of differential corrections or improvement of the SIS URE,or both.