Accuracy of Precise Timing Based on Uncombined Precise Point Positioning Algorithm in BeiDou Navigation Satellite System

MA Xiangtai; SHI Zengkai; QIAN Zhaoyong; HU Yanfeng; DONG Xurong

doi:10.11999/JEIT210629

Volume 44 Issue 9

Sep. 2022

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Article Navigation > Journal of Electronics & Information Technology > 2022 > 44(9): 3203-3211

MA Xiangtai, SHI Zengkai, QIAN Zhaoyong, HU Yanfeng, DONG Xurong. Accuracy of Precise Timing Based on Uncombined Precise Point Positioning Algorithm in BeiDou Navigation Satellite System[J]. Journal of Electronics & Information Technology, 2022, 44(9): 3203-3211. doi: 10.11999/JEIT210629

Citation:

MA Xiangtai, SHI Zengkai, QIAN Zhaoyong, HU Yanfeng, DONG Xurong. Accuracy of Precise Timing Based on Uncombined Precise Point Positioning Algorithm in BeiDou Navigation Satellite System[J]. Journal of Electronics & Information Technology, 2022, 44(9): 3203-3211. doi: 10.11999/JEIT210629

Citation:

MA Xiangtai, SHI Zengkai, QIAN Zhaoyong, HU Yanfeng, DONG Xurong. Accuracy of Precise Timing Based on Uncombined Precise Point Positioning Algorithm in BeiDou Navigation Satellite System[J]. Journal of Electronics & Information Technology, 2022, 44(9): 3203-3211. doi: 10.11999/JEIT210629

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Accuracy of Precise Timing Based on Uncombined Precise Point Positioning Algorithm in BeiDou Navigation Satellite System

doi: 10.11999/JEIT210629 cstr: 32379.14.JEIT210629

Department of Space Information, Space Engineering University, Beijing 101416, China

Funds: The Key Program of the National Natural Science Foundation of China (41631072), The National Natural Science Youth Foundation of China (41574034)

Received Date: 2021-06-28
Rev Recd Date: 2021-08-12

Available Online: 2021-09-01

Publish Date: 2022-09-19

Abstract

Abstract

Precise Point Positioning (PPP) of Global Navigation Satellite System (GNSS) has the advantages of simple operation, low cost, and high positioning accuracy, and has been widely used in precise timing. Considering the problems of high combined noise of ionosphere-free PPP model, major navigation satellite system being Global Positioning System (GPS), and fewer real-time dynamic scenes in the existing research, the uncombined PPP model is used to study the accuracy of timing in BeiDou navigation Satellite system (BDS). Static and dynamic models of Kalman filter is used in parameter estimation. PPP processing strategies for static and real-time dynamic scenarios are proposed, and ultra-fast forecast ephemeris is used to ensure real time. The results show that: Under static and real-time dynamic conditions, the accuracy of precise timing with the uncombined PPP model is better than that of the ionosphere-free PPP model; Under static condition, considering that the positioning accuracy of BDS and GPS is equivalent, and the positioning accuracy of BDS in the Asia Pacific Region is even higher, the timing accuracy of BDS is slightly higher than that of GPS; Under real-time dynamic condition, the precise timing accuracy of BDS and GPS is both within 2 ns. But owing to Position Dilution Of Precision (PDOP), sudden changes of carrier speed, and environmental factors, the timing accuracy of BDS is slightly lower. And when the convergence is completed, the timing accuracy of the two systems is equivalent, and the clock biases are all within 0.3 m.
- Precise Point Positioning (PPP),
- Precise timing,
- Uncombined,
- BeiDou navigation Satellite system (BDS),
- Real-time dynamic

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References(20)

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