Mathematics – Logic
Scientific paper
May 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997adspr..19..461c&link_type=abstract
Advances in Space Research, Volume 19, Issue 3, p. 461-467.
Mathematics
Logic
Scientific paper
Radar and satellite measurements were simultaneously used for the detailed description of the properties of precipitating clouds. Existing raindrops were detected by digitised data of an MRL-5 radar measuring at 3 and 10 cms. This information was merged with the physical characteristics of precipitating clouds retrieved from the radiance data of the operational meterological satellites. First, we used infrared and visible METEOSAT data for cloud classification and for a qualitative estimation of precipitation. Second, from the multispectral measurements of the Advanced Very High Resolution Radiometer (AVHRR) on board the polar orbiting NOAA satellites we explicitly derived cloud-top temperature, optical thickness and effective cloud droplet size. We also determined a cloud flag using a thresholding technique. The radar and satellite images were transformed into the same geographic projection format and displayed simultaneously for qualitative evaluation. Empirical relationships were established between coincident ground precipitation measurements, radar data and satellite cloud parameters. The effect of the additional information provided by AVHRR on the quality of the precipitation estimates was evaluated.
Csiszár Imre
Diószeghy M.
Kerényi J.
Major G.
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