ABSTRACT
Millimetre-wave radiometry is more and more
involved in meteorological satellites. Sounding near the 60-GHz and 118-GHz
oxygen absorption-lines is to provide the temperature profile of the atmosphere,
and sounding near 183 GHz is to give data about the water-vapour distribution
profile.
A radiative transfer model in a scattering
atmosphere bounded by sea surface is described. This model enables to compute
brightness temperatures at the top of the atmosphere from surface and
atmospheric parameters, and will serve as a preparation for the data treatment
of future meteorologically-oriented radiometric missions. Besides, some
technical radiometer points are discussed, concerning quasi-optical components,
calibration, and noise temperatures ; this work is a part of the conception of
a demonstration model for the Meteosat Second Generation millimetre-wave
sounder.
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