Preliminary assessment of the navigation and positioning performance of BeiDou regional navigation satellite system

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• 作者：YuanXi Yang (1) (2)
  JinLong Li (3)
  AiBing Wang (4)
  JunYi Xu (3) (5)
  HaiBo He (4)
  HaiRong Guo (4)
  JunFei Shen (4)
  Xian Dai (4)
  
• 关键词：BeiDou navigation satellite system ; service area ; dilution of precision ; precision of code and carrier phase measurement ; single point positioning ; code differential positioning ; ambiguity resolution ; carrier phase differential positioning
• 刊名：Science China Earth Sciences
• 出版年：2014
• 出版时间：January 2014
• 年：2014
• 卷：57
• 期：1
• 页码：144-152
• 全文大小：1,329 KB
• 作者单位：YuanXi Yang (1) (2)
  JinLong Li (3)
  AiBing Wang (4)
  JunYi Xu (3) (5)
  HaiBo He (4)
  HaiRong Guo (4)
  JunFei Shen (4)
  Xian Dai (4)
  
  1. National Key Laboratory of Geo-Information Engineering, Xi鈥檃n, 710054, China
  2. China National Administration of GNSS and Applications, Beijing, 100088, China
  3. College of Geo-Informatics, Information Engineering University, Zhengzhou, 450052, China
  4. Beijing Satellite Navigation Center, Beijing, 100094, China
  5. Xi鈥檃n Information Division of Surveying & Mapping, Xi鈥檃n, 710054, China
  
• ISSN：1869-1897

文摘

BeiDou regional navigation satellite system (BDS) also called BeiDou-2 has been in full operation since December 27, 2012. It consists of 14 satellites, including 5 satellites in Geostationary Orbit (GEO), 5 satellites in Inclined Geosynchronous Orbit (IGSO), and 4 satellites in Medium Earth Orbit (MEO). In this paper, its basic navigation and positioning performance are evaluated preliminarily by the real data collected in Beijing, including satellite visibility, Position Dilution of Precision (PDOP) value, the precision of code and carrier phase measurements, the accuracy of single point positioning and differential positioning and ambiguity resolution (AR) performance, which are also compared with those of GPS. It is shown that the precision of BDS code and carrier phase measurements are about 33 cm and 2 mm, respectively, which are comparable to those of GPS, and the accuracy of BDS single point positioning has satisfied the design requirement. The real-time kinematic positioning is also feasible by BDS alone in the opening condition, since its fixed rate and reliability of single-epoch dual-frequency AR is comparable to those of GPS. The accuracy of BDS carrier phase differential positioning is better than 1 cm for a very short baseline of 4.2 m and 3 cm for a short baseline of 8.2 km, which is on the same level with that of GPS. For the combined BDS and GPS, the fixed rate and reliability of single-epoch AR and the positioning accuracy are improved significantly. The accuracy of BDS/GPS carrier phase differential positioning is about 35 and 20 % better than that of GPS for two short baseline tests in this study. The accuracy of BDS code differential positioning is better than 2.5 m. However it is worse than that of GPS, which may result from large code multipath errors of BDS GEO satellite measurements.