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Proceedings Paper

Relationship of collocated cloud radiances in the METEOSAT IR and WV channel
Author(s): Andreas Ottenbacher; Johannes Schmetz
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Paper Abstract

Bispectral techniques employing the infrared (IR: 10.5 - 12.5 micrometers ) and water vapor (WV: 5.7 - 7.1 micrometers ) channels of the geostationary Meteosat satellites are in use for cloud classification and cloud altitude correction of semi-transparent cirrus clouds. This paper investigates the relationship between radiance observation in the IR and WV channel and the validity of various assumptions. Specifically the following problems are addressed: (1) accuracy of coregistration of two simultaneous images in the IR and WV channel, (2) the effect of instrument noise on single pixel classification, (3) the influence of moisture above the cloud top on the satellite observed radiances and (4) the effects of different cloud emissivities in both channels. The study makes use of both radiation model calculations and satellite observations. The impact of different ice particle distributions on cloud emissivity is studied.

Paper Details

Date Published: 23 December 1994
PDF: 7 pages
Proc. SPIE 2309, Passive Infrared Remote Sensing of Clouds and the Atmosphere II, (23 December 1994); doi: 10.1117/12.196660
Show Author Affiliations
Andreas Ottenbacher, European Space Agency/ESOC (Germany)
Johannes Schmetz, European Space Agency/ESOC (Germany)

Published in SPIE Proceedings Vol. 2309:
Passive Infrared Remote Sensing of Clouds and the Atmosphere II
David K. Lynch, Editor(s)

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