Journal of Climatology · 1987 · 37 citations · 7 references
Natural SciencesEarth SciencesMeteorologyAtmospheric ScienceClimatologyRadiation MeasurementGeostationary Satellite MeteorologySatellite Data ValidationSatellite Image InterpretationSatellite InstrumentationSatellite SensorsSolar RadiationGround-based Radiation MeasurementsRadianceRetrievalSatellite Cloud ObservationsSatellite Retrievals Of Surface RadiationSolar Radiation RetrievalsSurface Radiation ClimatologySurface Radiation Observations
Abstract The global radiation at the ground is determined from monthly samples of imaging data from the geostationary satellites METEOSAT 2 and GMS 2 with a method which has earlier been developed by Möser and Raschke (1983). These radiance data are reduced to obtain resolutions of 30 to 40 km in space and 3 h in time according to the B3 format of the ISCCP procedures. If compared with simultaneous pyranometer measurements these results agree within an uncertainty of better than 8–10 per cent for monthly averages of daily sums and of better than 25 per cent for individual daily sums. Possible error sources are not only contained in the retrieval procedure but are also due to errors in navigation of satellite images. Further, local orographic effects can contribute to differences between calculated and measured downward irradiances.
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