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http://dx.doi.org/10.5467/JKESS.2022.43.2.239

Characteristics and Quality Control of Precipitable Water Vapor Measured by G-band (183 GHz) Water Vapor Radiometer  

Kim, Min-Seong (Convergence Meteorological Research Department, National Institute of Meteorological Sciences)
Koo, Tae-Young (Convergence Meteorological Research Department, National Institute of Meteorological Sciences)
Kim, Ji-Hyoung (Convergence Meteorological Research Department, National Institute of Meteorological Sciences)
Jung, Sueng-Pil (Convergence Meteorological Research Department, National Institute of Meteorological Sciences)
Kim, Bu-Yo (Convergence Meteorological Research Department, National Institute of Meteorological Sciences)
Kwon, Byung Hyuk (Department of Environmental Atmospheric Sciences, Pukyong National University)
Lee, Kwangjae (Convergence Meteorological Research Department, National Institute of Meteorological Sciences)
Kang, Myeonghun (Convergence Meteorological Research Department, National Institute of Meteorological Sciences)
Yang, Jiwhi (Convergence Meteorological Research Department, National Institute of Meteorological Sciences)
Lee, ChulKyu (Convergence Meteorological Research Department, National Institute of Meteorological Sciences)
Publication Information
Journal of the Korean earth science society / v.43, no.2, 2022 , pp. 239-252 More about this Journal
Abstract
Quality control methods for the first G-band vapor radiometer (GVR) mounted on a weather aircraft in Korea were developed using the GVR Precipitable Water Vapor (PWV). The aircraft attitude information (degree of pitch and roll) was applied to quality control to select the shortest vertical path of the GVR beam. In addition, quality control was applied to remove a GVR PWV ≥20 mm. It was found that the difference between the warm load average power and sky load average power converged to near 0 when the GVR PWV increased to 20 mm or higher. This could be due to the high brightness temperature of the substratus and mesoclouds, which was confirmed by the Communication, Ocean and Meteorological Satellite (COMS) data (cloud type, cloud top height, and cloud amount), cloud combination probe (CCP), and precipitation imaging probe (PIP). The GVR PWV before and after the application of quality control on a cloudy day was quantitatively compared with that of a local data assimilation and prediction system (LDAPS). The Root Mean Square Difference (RMSD) decreased from 2.9 to 1.8 mm and the RMSD with Korea Local Analysis and Precipitation System (KLAPS) decreased from 5.4 to 4.3 mm, showing improved accuracy. In addition, the quality control effectiveness of GVR PWV suggested in this study was verified through comparison with the COMS PWV by using the GVR PWV applied with quality control and the dropsonde PWV.
Keywords
weather aircraft; precipitable water vapor; g-band water vapor radiometer; quality control;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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