Galileo Augmenting GPS Single-Frequency Single-Epoch Precise Positioning with Baseline Constrain for Bridge Dynamic Monitoring

Zhang, Qiuzhao; Ma, Chun; Meng, Xiaolin; Xie, Yilin; Psimoulis, Panagiotis; Wu, Laiyi; Yue, Qing; Dai, Xinjun

Abstract

© 2019 by the authors. The Single-frequency Single-epoch double-differenced baseline resolution technique of Global Positioning System (GPS) provides a good opportunity for monitoring the displacement or deflection behavior of bridges under different loading conditions in real-time. However, for single GPS, a high success rate baseline solution is difficult to achieve due to the lack of sufficient visible satellites and the low accuracy of float solutions. Galileo Satellite Navigation System (Galileo) has 14 medium earth orbit satellites (as of May 2018) that can be used to supplement GPS. The frequency bands of Galileo overlap with that of GPS on E1/L1 and E5a/L5, which is conducive to the combination of observations in integration positioning. Accordingly, Galileo augmenting GPS is an effective and necessary approach to improve the positioning availability and reliability. Moreover, using the baseline length constraint can improve the accuracy of float solutions, narrow the search space, and finally increase the success rate of ambiguity resolution and positioning. The single-frequency single-epoch double-differenced GPS/Galileo mathematical model with baseline length constraint is deduced in this paper. Two sets of GNSS real bridge data were used for further analysis on the improvement of GPS/Galileo with baseline length constraint when compared to single GPS. Finally, a Fast Fourier Transformation (FFT) algorithmwas adopted for precisely detecting the local dominant frequencies of XB, YB, and ZB direction of the two stations.

Citation

Zhang, Q., Ma, C., Meng, X., Xie, Y., Psimoulis, P., Wu, L., Yue, Q., & Dai, X. (2019). Galileo Augmenting GPS Single-Frequency Single-Epoch Precise Positioning with Baseline Constrain for Bridge Dynamic Monitoring. Remote Sensing, 11(4), Article 438. https://doi.org/10.3390/rs11040438

• Journal Article Type: Article
• Acceptance Date: Feb 17, 2019
• Online Publication Date: Feb 20, 2019
• Publication Date: Feb 20, 2019
• Deposit Date: Sep 20, 2019
• Journal: Remote Sensing
• Electronic ISSN: 2072-4292
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 11
• Issue: 4
• Article Number: 438
• DOI: https://doi.org/10.3390/rs11040438
• Keywords: General Earth and Planetary Sciences
• Public URL: https://nottingham-repository.worktribe.com/output/2641331
• Publisher URL: https://www.mdpi.com/2072-4292/11/4/438