Predicting sky types and zenith luminance from the cloud index derived from geostationary satellite data
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摘要This paper presents methods to predict sky types and hourly zenith luminance from cloud index n derived from the visible channel data of the geostationary satellites. Three sky conditions based on the CIE standard general sky can be classified by cloud index: n > 0.38, 0.13 <= n <= 0.38 and n < 0.13, corresponding to overcast, partly cloudy and clear sky conditions, more specifically to sky 1, sky 8 and sky 13 of the 'Hong Kong Representative Sky'. Hourly zenith luminance can be derived as a function of the combination of relative standard overcast sky zenith luminance and relative standard clear sky zenith luminance determined by cloud index. The mean bias error and the root mean square error of hourly zenith luminance are 0.49 and 3.37 kcd/m(2), respectively.
著者He JZ, Ng E
期刊名稱Lighting Research and Technology
出版年份2012
月份6
日期1
卷號44
期次2
出版社SAGE Publications (UK and US)
頁次139 - 148
國際標準期刊號1477-1535
語言英式英語
Web of Science 學科類別Construction & Building Technology; CONSTRUCTION & BUILDING TECHNOLOGY; Optics; OPTICS

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