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http://dx.doi.org/10.7848/ksgpc.2017.35.6.471

Development of Near Real Time GNSS Precipitable Water Vapor System Using Precise Point Positioning  

Yoon, Ha Su (Korea Astronomy and Space Science Institute)
Cho, Jung Ho (Korea Astronomy and Space Science Institute)
Park, Han Earl (Korea Astronomy and Space Science Institute)
Yoo, Sung Moon (Korea Astronomy and Space Science Institute)
Publication Information
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography / v.35, no.6, 2017 , pp. 471-484 More about this Journal
Abstract
GNSS PWV (Precipitable Water Vapor) is recognized as an important factor for weather forecasts of typhoons and heavy rainfall. Domestic and foreign research have been published that improve weather forecasts using GNSS PWV as initial input data to NWP (Numerical Weather Prediction) model. For rainfall-related weather forecasts, PWV should be provided in real time or NRT (Near-Real Time) and the accuracy and integrity should be maintained. In this paper, the development process of NRT GNSS PWV system using PPP (Precise Point Positioning). To this end, we optimized the variables related to tropospheric delay estimation of PPP. For the analysis of the PPP NRT PWV system, we compared the PWV precision of RP (Relative Positioning) and PPP. As a result, the accuracy of PPP was lower than that of RP, but good results were obtained in the PWV data integrity. Future research is needed to improve the precision of PWV in the PPP method.
Keywords
Precise Point Positioning; Near Real Time; Global Navigation Satellite System; Precipitable Water Vapor;
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Times Cited By KSCI : 8  (Citation Analysis)
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