|Abstract:||Instantaneous precise positioning with decimeter-level accuracy is an urgent need in some emerging applications such as autonomous driving. In this study, we implemented instantaneous PPP wide-lane ambiguity resolution (PPP-WAR) over a regional network from Australia to analyze the performance of this instantaneous, or single-epoch, decimeter-level positioning strategy. With 32 days of triple-frequency multi-GNSS (GPS/BeiDou/Galileo/QZSS) data from 83 global stations, we firstly calculated satellite clock, ISPB and FCB products, and found that ISPBs and FCBs were all stable and estimable for a certain period of time so that they can be used for real-time PPP-WAR with wide-lane ambiguities resolution. In detail, the station-specific daily ISPBs were stable with an RMS of better than 0.03 and 0.05 cycles for extra-wide-lane and wide-lane ambiguities, respectively. Similarly, satellite-specific inter- system daily FCBs also had a high precision that over 99% residuals fell into ±0.1 cycles for both extra-wide-lane and wide-lane ambiguities, respectively. And then, in order to analyze the positioning performance of instantaneous PPP-WAR, we selected 31 stations in Australia to conduct simulated kinematic experiments. The average accuracy reached 0.18, 0.14 and 0.41 m for east, north and up directions, and even 0.15, 0.11 and 0.38 m when the number of available satellites reaches 23 or more. In the near future, the positioning accuracy can be potentially improved with this PPP-WAR method when all multi-frequency GNSS constellations were in orbit.|
Proceedings of the ION 2019 Pacific PNT Meeting
April 8 - 11, 2019
Hilton Waikiki Beach
|Pages:||1013 - 1022|
|Cite this article:||
Geng, Jianghui, Guo, Jiang, Chang, Hua, Zeng, Ran, "Instantaneous Decimeter-level Positioning using Triple-frequency GPS/BeiDou/Galileo/QZSS Data Over Wide Areas," Proceedings of the ION 2019 Pacific PNT Meeting, Honolulu, Hawaii, April 2019, pp. 1013-1022.
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