한국측량학회:학술대회논문집 (Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference)
- 한국측량학회 2007년도 춘계학술발표회 논문집
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- Pages.27-30
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- 2007
GPS 관측데이터 정밀 해석을 통한 가강수량 추정 정확도 향상
Accuracy Improvement of Precipitable Water Vapor Estimation by Precise GPS Analysis
초록
The objective of this study is to improve an accuracy of PWV estimates using GPS in Korea. We determined a weighted mean temperature equation by a linear regression method based on 6 radiosonde meteorological observations, for a total 17,129 profiles, from 2003 to 2005. Weighted mean temperature, Tm, is a key parameter in the retrieval of atmospheric PWV from ground-based GPS measurements of zenith path delay. The accuracy of the GPS-derived PWV is proportional to the accuracy of Tm. And we applied the reduction of air Pressure to GPS station altitude. The reduction value of air pressure from mean sea level to GPS stations altitude is adopted a reverse sea level correction.
키워드