Proceedings of the KSRS Conference (대한원격탐사학회:학술대회논문집)
- 2008.10a
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- Pages.430-432
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- 2008
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- 1226-9743(pISSN)
THE DEVELOPMENT OF IR-BASED VISIBLE CHANNEL CALIBRATION USING DEEP CONVECTIVE CLOUDS
- Ham, Seung-Hee (Seoul National University) ;
- Sohn, Byung-Ju (Seoul National University)
- Published : 2008.10.29
Abstract
Visible channel calibration method using deep convective clouds (DCCs) is developed. The method has advantages that visible radiance is not sensitive to cloud optical thickness (COT) for deep convective clouds because visible radiance no longer increases when COT exceeds 100. Therefore, once DCCs are chosen appropriately, and then cloud optical properties can be assumed without operational ancillary data for the specification of cloud conditions in radiative transfer model. In this study, it is investigated whether IR measurements can be used for the selection of DCC targets. To construct appropriate threshold value for the selection of DCCs, the statistics of cloud optical properties are collected with MODIS measurements. When MODIS brightness temperature (TB) at 11