Clouds-Aerosols-Precipitation Satellite Analysis Tool (CAPSAT) I. M. Lensky1 and D. Rosenfeld2 1Department of Geography and Environment, Bar-Ilan University, Ramat-Gan, Israel 2Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
Abstract. A methodology for representing much of the physical information content of
the METEOSAT Second Generation (MSG) geostationary satellite using
red-green-blue (RGB) composites of the computed physical values of the
picture elements is presented. The physical values are the solar reflectance
in the solar channels and brightness temperature in the thermal channels.
The main RGB compositions are (1) "Day Natural Colors", presenting
vegetation in green, bare surface in brown, sea surface in black, water
clouds as white, ice as magenta; (2) "Day Microphysical", presenting cloud
microstructure using the solar reflectance component of the 3.9 μm,
visible and thermal IR channels; (3) "Night Microphysical", also presenting
clouds microstructure using the brightness temperature differences between
10.8 and 3.9 μm; (4) "Day and Night", using only thermal channels for
presenting surface and cloud properties, desert dust and volcanic emissions;
(5) "Air Mass", presenting mid and upper tropospheric features using thermal
water vapor and ozone channels. The scientific basis for these rendering
schemes is provided, with examples for the applications. The expanding use
of these rendering schemes requires their proper documentation and setting
as standards, which is the main objective of this publication.
Citation: Lensky, I. M. and Rosenfeld, D.: Clouds-Aerosols-Precipitation Satellite Analysis Tool (CAPSAT), Atmos. Chem. Phys., 8, 6739-6753, doi:10.5194/acp-8-6739-2008, 2008.