Abstract
Due to the special constellation design with GEO, IGSO and MEO, the BeiDou System (BDS) now is available to provide a good coverage over the China region. This makes it possible to study the precipitable water vapor (PWV) inversion with only BeiDou observations using the precise point positioning (PPP) method. This paper selected 5 stations among the BETS (BeiDou Experiment Tracking Stations) network with GPS/BDS dual-mode dual-frequency data for the research. By the PPP approach, the zenith tropospheric delay (ZTD) was estimated at each station using only BDS or GPS observations respectively. And then the PWV was obtained by a conversion factor and the zenith wet delay retrieved from the estimated ZTD. The results show that due to the bias of 1–10 mm existing between the BDS- and GPS-derived ZTD, the inferred BDS-PWV and GPS-PWV is biased about 0.1–2 mm. And the final mean bias and STD of BDS- and GPS-PWV difference of all 5 stations is 0.78 and 1.73 mm. It is concluded that the PWV inferred from BDS can reach similar precision comparing to the GPS-PWV in the China region.
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Acknowledgments
This work was sponsored by the National Natural Science Foundation (Grant No.41204029, 41274049, 41325015) and the BeiDou Outstanding Youth Foundation (Grant No. CSNC2012-QY-1).
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Li, W., Li, M., Qu, L., Su, X., Zhao, Q. (2014). Initial Research on Comparison of PPP-Inferred GPS- and BDS-PWV in China Region. In: Sun, J., Jiao, W., Wu, H., Lu, M. (eds) China Satellite Navigation Conference (CSNC) 2014 Proceedings: Volume III. Lecture Notes in Electrical Engineering, vol 305. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-54740-9_18
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DOI: https://doi.org/10.1007/978-3-642-54740-9_18
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