Abstract
GNSS single-epoch real-time kinematic (RTK) positioning depends on correct ambiguity resolution. If the number of observed satellites in a single epoch is insufficient, which often happens with a standalone GNSS system, the ambiguity resolution is difficult to achieve. China’s BeiDou Navigation Satellite System has been providing continuous passive positioning, navigation and timing services since December 27, 2012, covering China and the surrounding area. This new system will increase the number of satellites in view and will have a significant effect on successful ambiguity resolution. Since the BeiDou system is similar to GPS, the procedure of data processing is easier than that for the Russian GLONASS system. We briefly introduce the time and the coordinate system of BeiDou and also the BeiDou satellite visibility in China, followed by the discussion on the combined GPS/BeiDou single-epoch algorithm. Experiments were conducted and are presented here, in which the GPS/BeiDou dual-frequency static data were collected in Wuhan with the baseline distance varying from 5 to 13 km, and processed in separate and combined modes. The results indicate that, compared to a standalone GPS or BeiDou system, the combined GNSS system can increase the successful ambiguity fixing rate for single epochs and can also improve the precision of short baselines determination.
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Acknowledgments
This work is partially sponsored by Natural Science Foundation of China (Grant No. 41004014 and No. 41304028), partially sponsored by National 863 Project of China (2012AA12A202), partially supported by “the Fundamental Research Funds for the Central Universities” (No. 2012214020208) and partially supported by “the Open Foundation of the State Key Laboratory of Geodesy and Earth’s Dynamics (Grant No. SKLGED2013-4-9-E).” The authors are very grateful to the anonymous reviewers for their constructive comments and suggestions.
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Deng, C., Tang, W., Liu, J. et al. Reliable single-epoch ambiguity resolution for short baselines using combined GPS/BeiDou system. GPS Solut 18, 375–386 (2014). https://doi.org/10.1007/s10291-013-0337-5
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DOI: https://doi.org/10.1007/s10291-013-0337-5