310 
5. Conclusion 
This method enables the determination of the 
incoming solar radiation reaching the ground by 
evaluation of satellite data. The mean accuracy for 
monthly averages is about 110 J/cm 2 (spatial 
resolution in subsatellite point: (5km) 2 ). Because 
this method can be easely applied to datasets of 
different geosationary satellites (so far Meteosat 
and GMS) it is feasible to prepare maps of global 
radiation over the entire globe. For this effort 
the B3 - dataset of the ISCCP can be used. 
References 
Gratzki, A. 1985. Bestimmung der Globalstrahlung 
aus Meteosat - daten. Diplomarbeit, Köln. 
Kerschgens, M., Pilz U., Raschke, E. 1978: A 
modified two-stream approximation for computa 
tions of the solar radiation budget in a cloudy 
atmosphere. Tellus 30, 429-435. 
Möser, W. , Raschke, E. 1982. Determination of 
global radiation and cloudiness from Meteosat 
imaging data. Ann.Meteor. 18, 161-163. 
Rieland, M. 1985. Bestimmung der Globalstrahlung 
aus Daten des Satelliten GMS. Diplomarbeit, Köln. 
WCP-Report No 42 1982. Report of the first session 
of the International Working Group on Data 
Management for the ISCCP. New York City. 
WMO-Technical Note No 172 1981. Meteorolgical 
Aspects of the Utilization of Solar Radiation 
as an Energy Source. Genf. 
Woods, J.D., Barkmann W. , Horch 1984. Solar 
heating of the oceans - diurnal, seasonal and 
meridional variation. Guart.J.R.Met.Sac. 110 
pp 663-656