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A theoretical and empirical integrated method to select the optimal combined signals for geometry-free and geometry-based three-carrier ambiguity resolution

Zhao, Dongsheng; Roberts, Gethin Wyn; Lau, Lawrence; Hancock, Craig; Bai, Ruibin

A theoretical and empirical integrated method to select the optimal combined signals for geometry-free and geometry-based three-carrier ambiguity resolution Thumbnail


Authors

Dongsheng Zhao

Gethin Wyn Roberts

Lawrence Lau

Craig Hancock

Ruibin Bai



Abstract

12 GPS Block IIF satellites, out of the current constellation, can transmit on three-frequency signals (L1, L2, L5). Taking advantages of these signals, Three-Carrier Ambiguity Resolution (TCAR) is expected to bring much benefit for ambiguity resolution. One of the research areas is to find the optimal combined signals for a better ambiguity resolution in geometry-free (GF) and geometry-based (GB) mode. However, the existing researches select the signals through either pure theoretical analysis or testing with simulated data, which might be biased as the real observation condition could be different from theoretical prediction or simulation. In this paper, we propose a theoretical and empirical integrated method, which first selects the possible optimal combined signals in theory and then refines these signals with real triple-frequency GPS data, observed at eleven baselines of different lengths. An interpolation technique is also adopted in order to show changes of the AR performance with the increase in baseline length. The results show that the AR success rate can be improved by 3% in GF mode and 8% in GB mode at certain intervals of the baseline length. Therefore, the TCAR can perform better by adopting the combined signals proposed in this paper when the baseline meets the length condition.

Journal Article Type Article
Acceptance Date Nov 1, 2016
Online Publication Date Nov 16, 2016
Deposit Date Nov 2, 2016
Publicly Available Date Nov 16, 2016
Journal Sensors
Electronic ISSN 1424-8220
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 16
Issue 11
Article Number 1929
DOI https://doi.org/10.3390/s16111929
Keywords GPS; ambiguity resolution; geometry-free; geometry-based; triple-frequency observations; real data
Public URL https://nottingham-repository.worktribe.com/output/828374
Publisher URL http://www.mdpi.com/1424-8220/16/11/1929

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