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

Author

Boukabara, Sid-Ahmed ; Weng, Fuzhong

Author_Institution

Center for Satellite Applic. & Res., Nat. Oceanic & Atmos. Adm., Camp Springs, MD

Volume

46

Issue

2

fYear

2008

Firstpage

376

Lastpage

384

Abstract

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.

Keywords

Global Positioning System; atmospheric techniques; remote sensing; wind; FASTEM-3 model; airborne GPS dropsondes; all-weather condition; clear condition; emissivity spectra; global positioning system dropsonde WINDSAT measurement; horizontal polarization; microwave emissivity; ocean; rainy condition; variational approach; vertical polarization; Dielectric constant; Global Positioning System; Hurricanes; Ocean temperature; Optical surface waves; Rough surfaces; Sea surface; Solid modeling; Surface roughness; Surface treatment; Dropsonde (DS); hurricane; microwave emissivity; retrieval algorithm; variational assimilation;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/TGRS.2007.905366

Filename

4410503