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Proceedings Paper

Validation and homogenization of cloud property retrievals for RMIB GERB/SEVIRI scene identification
Author(s): Alessandro Ipe; Cedric Bertrand; Nicolas Clerbaux; Steven Dewitte; Luis Gonzalez; Bogdan Nicula
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Paper Abstract

The Geostationary Earth Radiation Budget (GERB) instrument has been launched this summer together with the Spinning Enhanced Visible and InfraRed Imager (SEVIRI) on board of the Meteosat Second Generation (MSG) satellite. This broadband radiometer will aim to deliver near real-time estimates of the top of the atmosphere (TOA) radiative fluxes at the high temporal resolution due to the geostationary orbit. In order to infer these fluxes, a radiance-to-flux conversion based on Clouds and the Earth's Radiant Energy System (CERES) angular dependency models (ADMs) need to be performed on measured radiances. Due to the stratification of these ADMs according to some CERES scene identification (SI) features such as cloud optical depth and cloud fraction, the GERB ground segment must include some SI on SEVIRI data which mimic as close as possible the one from CERES in order to select the proper ADM. In this paper, we briefly present the method we used to retrieve cloud optical depth and cloud fraction on footprints made of several imager pixels. We then compare the retrieval of both features on the same targets using nearly time-simultaneous Meteosat-7 imager and CERES Single Satellite Footprint (SSF) data. The targets are defined as CERES radiometer footprints. We investigate the possible discrepancies between the two datasets according to surface type and, if they exist, suggest some strategies to homogenize GERB retrievals based on CERES ones.

Paper Details

Date Published: 18 April 2003
PDF: 11 pages
Proc. SPIE 4882, Remote Sensing of Clouds and the Atmosphere VII, (18 April 2003); doi: 10.1117/12.462419
Show Author Affiliations
Alessandro Ipe, Royal Meteorological Institute of Belgium (Belgium)
Cedric Bertrand, Royal Meteorological Institute of Belgium (Belgium)
Nicolas Clerbaux, Royal Meteorological Institute of Belgium (Belgium)
Steven Dewitte, Royal Meteorological Institute of Belgium (Belgium)
Luis Gonzalez, Royal Meteorological Institute of Belgium (Belgium)
Bogdan Nicula, Vrije Univ. Brussel (Belgium)

Published in SPIE Proceedings Vol. 4882:
Remote Sensing of Clouds and the Atmosphere VII
Klaus P. Schaefer; Olga Lado-Bordowsky; Adolfo Comeron; Richard H. Picard, Editor(s)

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