Microwave Emissivity Over Ocean in All-Weather Conditions: Validation Using WINDSAT and Airborne GPS Dropsondes

Emissivity spectra computed by the FASTEM-3 model using global positioning system dropsonde wind as input are compared to emissivity retrieved from stringently coincident WINDSAT measurements, using a variational approach. This is done in both clear and rainy conditions to assess the validity of bot...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 2008-02, Vol.46 (2), p.376-384
Main Authors: Boukabara, S.-A., Fuzhong Weng
Format: Article
Language:English
Subjects:
Dielectric constant
Dropsonde (DS)
Dropsondes
Emissivity
Global Positioning System
Horizontal polarization
hurricane
Hurricanes
Marine
microwave emissivity
Microwaves
Ocean temperature
Oceans
Optical surface waves
retrieval algorithm
Rough surfaces
Satellite navigation systems
Sea surface
Solid modeling
Spectral emissivity
Surface roughness
Surface treatment
variational assimilation
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Summary:Emissivity spectra computed by the FASTEM-3 model using global positioning system dropsonde wind as input are compared to emissivity retrieved from stringently coincident WINDSAT measurements, using a variational approach. This is done in both clear and rainy conditions to assess the validity of both the emissivity model and the retrieval technique in all conditions. Results of this comparison are presented for vertical and horizontal polarizations, in moderate to high wind conditions. In particular, a slope difference is found, and its potential sources are discussed in this paper.
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2007.905366