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344 IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 46, NO. 2, FEBRUARY 2008 A Parameterization of the Microwave Land Surface
 

Summary: 344 IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 46, NO. 2, FEBRUARY 2008
A Parameterization of the Microwave Land Surface
Emissivity Between 19 and 100 GHz, Anchored
to Satellite-Derived Estimates
Catherine Prigent, Elodie Jaumouillé, Frédéric Chevallier, and Filipe Aires
Abstract--Land surface emissivities have been calculated for
Tropical Rainfall Measuring Mission (TRMM) Microwave In-
strument (TMI), Special Sensor Microwave/Imager (SSM/I), and
Advanced Microwave Sounder Unit-A conditions, for two months
(July 2002 and January 2003) over the globe at the European
Centre for Medium-Range Weather Forecasts, directly from satel-
lite observations. From this data set, a parameterization of the
microwave emissivities that account for frequency, incidence an-
gle, and polarization dependences is proposed. It is anchored to
climatological monthly mean maps of the emissivities at 19, 37,
and 85 GHz, which are calculated from SSM/I. For each location
and time of the year, it provides realistic first-guess estimates of
the microwave emissivities from 19 to 100 GHz, for all scanning
conditions. The results are compared to radiative transfer model
estimates. The new estimates provide rms errors that are usually

  

Source: Aires, Filipe - Laboratoire de Météorologie Dynamique du CNRS, Université Pierre-et-Marie-Curie, Paris 6

 

Collections: Geosciences