| Chen Jian (陈健),Yue Dongjie,Zhu Shaolin,Liu Zhiqiang,Dai Jianbiao.[J].高技术通讯(英文),2020,26(3):235~242 |
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| Comparison of availability and reliability among different combined-GNSS/RNSS precise point positioning |
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| DOI：doi：10.3772/j.issn.1006-6748.2020.03.001 |
| 中文关键词: |
| 英文关键词: precise point positioning (PPP), positioning accuracy, convergence rate, multiple global and regional navigation satellite systems (multi-GNSS/RNSS), reliability and availability |
| 基金项目: |
| Author Name | Affiliation | | Chen Jian (陈健) | (School of Earth Science and Engineering, Hohai University, Nanjing 211100, P.R.China) | | Yue Dongjie | (School of Earth Science and Engineering, Hohai University, Nanjing 211100, P.R.China) | | Zhu Shaolin | (School of Earth Science and Engineering, Hohai University, Nanjing 211100, P.R.China) | | Liu Zhiqiang | (School of Earth Science and Engineering, Hohai University, Nanjing 211100, P.R.China) | | Dai Jianbiao | (School of Earth Science and Engineering, Hohai University, Nanjing 211100, P.R.China) |
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| 中文摘要: |
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| 英文摘要: |
| With emergence of the BeiDou Navigation Satellite System (BDS), the Galileo Satellite Navigation System (Galileo), the Quasi-Zenith Satellite System (QZSS)and the restoration of the Global Navigation Satellite System (GLONASS), the single Global Positioning System (GPS) has been gradually expanded into multiple global and regional navigation satellite systems (multi-GNSS/RNSS). In view of differences in these 5 systems, a consolidated multi-GNSS/RNSS precise point positioning(PPP) observation model is deduced in this contribution. In addition, the performance evaluation of PPP for multi-GNSS/RNSS is conducted using a large number of the multi-GNSS experiment (MGEX) station datasets. Experimental results show that multi-GNSS/RNSS can guarantee plenty of visible satellites effectively. Compared with single-system GPS, PDOP, HDOP, and VDOP values of the multi-GNSS/RNSS are improved by 46.8%, 46.5% and 46.3%, respectively. As for convergence time, the static and kinematic PPP of multi-GNSS/RNSS are superior to that of the single-system GPS, whose reliability, availability, and stability drop sharply with the increasing elevation cutoff. At satellite elevation cutoff of 40°, the single-system GPS fails to carry out continuous positioning because of the insufficient visible satellites, while the multi-GNSS/RNSS PPP can still get positioning solutions with relatively high accuracy, especially in the horizontal direction. |
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