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A technique for mapping global illuminance from satellite data


Janjai, S and Tohsing, K and Nunez, M and Laksanaboonsong, J, A technique for mapping global illuminance from satellite data, Solar Energy, 82, (6) pp. 543-555. ISSN 0038-092X (2008) [Refereed Article]

DOI: doi:10.1016/j.solener.2007.11.003


A technique for mapping global illuminance from satellite data was developed. A five-year (19982002) climatology of global solar illuminance obtained from this technique is presented for Thailand using hourly GMS-5 satellite data. The technique is based on a radiation budget model which traces solar radiation as it is scattered, absorbed and reflected back to space. The model produces an earth-atmospheric albedo in the satellite spectral window as well as global illuminance at the earths surface. The model is tuned using surface illuminance measurements at four stations in Thailand: Chiang Mai (18.78N, 98.98E), Ubon Ratchatani (15.25N, 104.87E), Songkhla (7.20N, 100.60 E) and Nakhon Pathom (13.82N, 100.04E). In the mapping process, a satellite earth-atmospheric albedo at any locations yields a cloud-atmospheric albedo in the satellite band, which is then transformed into a cloud-atmospheric albedo in the photopic band. Having obtained the photopic cloud-atmospheric albedo, the model calculates surface illuminance. The model gives a root mean square difference of 8.1% and a mean bias difference of −2.6% when tested against an independent data set. Monthly average maps are presented covering Thailand for local times of 10:30, 12:30 and 14:30.

Item Details

Item Type:Refereed Article
Keywords:Solar radiation; Daylight; Illuminance; Satellite data; Mapping
Research Division:Earth Sciences
Research Group:Climate change science
Research Field:Climatology
Objective Division:Environmental Management
Objective Group:Air quality, atmosphere and weather
Objective Field:Air quality, atmosphere and weather not elsewhere classified
UTAS Author:Nunez, M (Dr Manuel Nunez)
ID Code:55087
Year Published:2008
Web of Science® Times Cited:12
Deposited By:Geography and Environmental Studies
Deposited On:2009-03-05
Last Modified:2009-03-18

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