Android smartphone GNSS high-precision real-time dynamic positioning

被引：0
|
作者：
Gao C. [1 ]
Chen B. [1 ]
Liu Y. [1 ]
机构：
[1] School of Transportation, Southeast University, Nanjing
来源：
Cehui Xuebao/Acta Geodaetica et Cartographica Sinica | 2021年 / 50卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Android smartphone; GNSS; PPP; Real-time dynamic positioning; RTK;
D O I：
10.11947/j.AGCS.2020.20200107
中图分类号：
学科分类号：
摘要：
Based on the quality and peculiarity of smartphone GNSS measurements, the existing methods of real-time dynamic PPP and RTK positioning are improved, and better smartphone GNSS positioning results obtained. Both positioning methods use a constant-acceleration dynamic single-frequency Kalman filter model with unfixed carrier phase integer ambiguity. Improvements include using smartphone carrier phase observation uncertainty for gross error processing, adopting the strategy of between-satellite single-difference to eliminate the influence of that the differences between smartphone pseudorange and carrier phase observations are not fixed, and modifying the value of smartphone measurements noise variance in the Kalman filtering process. Using one selected smartphone for experimental verification, the results show that its real-time dynamic PPP can reach a stable positioning state within 99 s, the horizontal and vertical RMS positioning error after stabilization are 1.21 and 2.79 m, respectively. RTK positioning can reach a stable state in 29 s, the horizontal and vertical RMS positioning error after stabilization are 0.73 and 0.78 m respectively. The experimental test results show that the current GNSS positioning module of smartphones could provide more accurate location services, and even has the potential for mapping operations in certain specific scenarios. © 2021, Surveying and Mapping Press. All right reserved.
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页码：18 / 26
页数：8
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