대한원격탐사학회:학술대회논문집 (Proceedings of the KSRS Conference)
- 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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- Pages.294-297
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- 2007
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- 1226-9743(pISSN)
EVALUATION OF SEA FOG DETECTION USING A REMOTE SENSED DATA COMBINED METHOD
- Heo, Ki-Young (Division of Earth Environmental System, College of Natural Science, Pusan National University) ;
- Ha, Kyung-Ja (Division of Earth Environmental System, College of Natural Science, Pusan National University) ;
- Kim, Jae-Hwan (Division of Earth Environmental System, College of Natural Science, Pusan National University) ;
- Shim, Jae-Seol (Coastal Disaster Prevention Research Division, Korea Ocean Research & Development Institute) ;
- Suh, Ae-Sook (Environmental and Meteorological Satellite Division, Korean Meteorological Administration)
- 발행 : 2007.10.31
초록
Steam and advection fogs are frequently observed in the Yellow Sea located between Korea and China during the periods of March-April and June-July respectively. This study uses the remote sensing (RS) data for monitoring sea fog. Meteorological data obtained from the Ieodo Ocean Research Station provided an informative synopsis for the occurrence of steam and advection fogs through a ground truth. The RS data used in this study was GOES-9, MTSAT-1R images and QuikSCAT wind data. A dual channel difference (DCD) approach using IR and near-IR channel of GOES-9 and MTSAT-1R satellites was applied to estimate the extension of the sea fog. For the days examined, it was found that not only the DCD but also the texture-related measurement and the weak wind condition are required to separate the sea fog from the low cloud. The QuikSCAT wind is used to provide a weak wind area less than threshold under stable condition of the surface wind around a fog event. The Laplacian computation for a measurement of the homogeneity was designed. A new combined method of DCD, QuikSCAT wind speed and Laplacian was applied in the twelve cases with GOES-9 and MTSAT-1R. The threshold values for DCD, QuikSCAT wind speed and Laplacian are -2.0 K, 8 m