지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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Cloud amount calculation algorithm was developed using MTSAT-1R satellite data. The cloud amount is retrieved at 5 km × 5 km over the Korean Peninsula and adjacent sea area. The algorithm consists of three steps that are cloud detection, cloud type classification, and cloud amount calculation. At the first step, dynamic thresholds method was applied for detecting cloud pixels. For using objective thresholds in the algorithm, sensitivity test was performed for TBB and Albedo variation with temporal and spatial change. Detected cloud cover was classified into 3 cloud types (low-level cloud, cirrus or uncertain cloud, and cumulonimbus type high-level cloud) in second step. Finally, cloud amount was calculated by the integration method of the steradian angle of each cloud pixel over 3° elevation. Calculated cloud amount was compared with measured cloud amount with eye at surface observatory for the validation. Bias, RMSE, and correlation coefficient were 0.4, 1.8, and 0.8, respectively. Validation results indicated that calculated cloud amount was a little higher than measured cloud amount but correlation was considerably high. Since calculated cloud amount has 5km × 5km resolution over Korean Peninsula and adjacent sea area, the satellite-driven cloud amount could show the possibility which overcomes the temporal and spatial limitation of measured cloud amount with eye at surface observatory.
목차
Abstract
1. 서론
2. 자료
3. 알고리즘
4. 전운량 산출 결과 검증
5. 요약 및 결론
감사
참고문헌
참고문헌 (7)
참고문헌 신청
1. [학술지(정기간행물)] - Ackerman, S. A / 1998 / Discriminating clear sky clouds with MODIS 103 : 32141 ~ 32157
2. [학술지(정기간행물)] - Dybbroe A / 2005 / NWCSAF AVHRR cloud detection and analysis using dynamic thresholds and radiative transfer modeling. Part I:Algorithm description 44 : 39 ~ 54
3. [학술지(정기간행물)] - Jedlovec, G. J / 2003 / GOES cloud detection at the global hydrology and climate center. Preprints : 1 ~ 21
4. [학술지(정기간행물)] - Minnis / 1987 / Cloud cover over theequatorial eastern Pacific derived for July 1983 InternationalSatellite Cloud Climatology Project Data using ahybrid bispectral threshold method : 4051 ~ 4073
5. [학술지(정기간행물)] - Rossow / 1993 / Cloud detection usingsatellite measurements of infrared and visible radiancesfor ISCCP : 2341 ~ 2369
2. [학술지(정기간행물)] - Dybbroe A / 2005 / NWCSAF AVHRR cloud detection and analysis using dynamic thresholds and radiative transfer modeling. Part I:Algorithm description 44 : 39 ~ 54
3. [학술지(정기간행물)] - Jedlovec, G. J / 2003 / GOES cloud detection at the global hydrology and climate center. Preprints : 1 ~ 21
4. [학술지(정기간행물)] - Minnis / 1987 / Cloud cover over theequatorial eastern Pacific derived for July 1983 InternationalSatellite Cloud Climatology Project Data using ahybrid bispectral threshold method : 4051 ~ 4073
5. [학술지(정기간행물)] - Rossow / 1993 / Cloud detection usingsatellite measurements of infrared and visible radiancesfor ISCCP : 2341 ~ 2369
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UCI(KEPA) : I410-ECN-0101-2009-453-016247598