An improvement of the IGMK model to derive total and diffuse solar radiation at the surface from satellite data
- Koeln Universitaet, Cologne (Germany, F.R.)
The IGMK model was developed by Moeser and Raschke (1983) to determine global radiation from GEO satellite data; this paper presents some improvements of IGMK including a totally new treatment of cloud transmittance in combination with the clear-sky atmospheric state. This new algorithm explicitly accounts for multiple reflections between surface and atmospheric layers, which is most important for the diffuse component of global radiation. With the new IGMK model, the diffuse component of the global radiation can be derived from satellite data. The clear-sky background atmospheric treatment also includes more variables, which account for regional and temporal variations of all atmospheric constituents as well as the dependence of incoming radiation on the elevation of the surface. By use of Meteosat ISCCP-B2 it is demonstrated that, over a period of 2 years, the deviations between the IGMK model results and surface measurements are less than 10 percent. 35 refs.
- OSTI ID:
- 6761642
- Journal Information:
- Journal of Applied Meteorology; (USA), Vol. 29, Issue 7; ISSN 0894-8763
- Country of Publication:
- United States
- Language:
- English
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