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http://dx.doi.org/10.7780/kjrs.2017.33.5.1.12

Cloud Detection Using HIMAWARI-8/AHI Based Reflectance Spectral Library Over Ocean  

Kwon, Chaeyoung (Division of Earth Environmental System Science(Major of Spatial Information Engineering), Pukyong National University)
Seo, Minji (Division of Earth Environmental System Science(Major of Spatial Information Engineering), Pukyong National University)
Han, Kyung-Soo (Division of Earth Environmental System Science(Major of Spatial Information Engineering), Pukyong National University)
Publication Information
Korean Journal of Remote Sensing / v.33, no.5_1, 2017 , pp. 599-605 More about this Journal
Abstract
Accurate cloud discrimination in satellite images strongly affects accuracy of remotely sensed parameter produced using it. Especially, cloud contaminated pixel over ocean is one of the major error factors such as Sea Surface Temperature (SST), ocean color, and chlorophyll-a retrievals,so accurate cloud detection is essential process and it can lead to understand ocean circulation. However, static threshold method using real-time algorithm such as Moderate Resolution Imaging Spectroradiometer (MODIS), Advanced Himawari Imager (AHI) can't fully explained reflectance variability over ocean as a function of relative positions between the sun - sea surface - satellite. In this paper, we assembled a reflectance spectral library as a function of Solar Zenith Angle (SZA) and Viewing Zenith Angle (VZA) from ocean surface reflectance with clear sky condition of Advanced Himawari Imager (AHI) identified by NOAA's cloud products and spectral library is used for applying the Dynamic Time Warping (DTW) to detect cloud pixels. We compared qualitatively between AHI cloud property and our results and it showed that AHI cloud property had general tendency toward overestimation and wrongly detected clear as unknown at high SZA. We validated by visual inspection with coincident imagery and it is generally appropriate.
Keywords
Cloud detection; Dynamic Time Warping (DTW); Reflectance spectral library; HIMAWARI-8/AHI;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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