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The emissivity of foam-covered water surface at L-band: theoretical modeling and experimental results from the FROG 2003 field experiment

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10.1109/TGRS.2004.839651
 
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hdl:2117/10108

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Rodríguez, R
Monerris Belda, Alessandra
Sabia, Roberto
Miranda Mendoza, Jorge José
Camps Carmona, Adriano JoséMés informacióMés informacióMés informació
Vall-Llossera Ferran, Mercedes MagdalenaMés informacióMés informacióMés informació
Villarino Villarino, Ramón
Reul, N
Chapron, B
Corbella Sanahuja, IgnasiMés informacióMés informacióMés informació
Duffo Ubeda, NúriaMés informacióMés informacióMés informació
Torres Torres, FranciscoMés informacióMés informacióMés informació
Document typeArticle
Defense date2005-05
PublisherIEEE Press. Institute of Electrical and Electronics Engineers
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
Sea surface salinity can be measured by microwave radiometry at L-band (1400–1427 MHz). This frequency is a compromise between sensitivity to the salinity, small atmospheric perturbation, and reasonable pixel resolution. The description of the ocean emission depends on two main factors: 1) the sea water permittivity, which is a function of salinity, temperature, and frequency, and 2) the sea surface state, which depends on the wind-induced wave spectrum, swell, and rain-induced roughness spectrum, and by the foam coverage and its emissivity. This study presents a simplified two-layer emission model for foam-covered water and the results of a controlled experiment to measure the foam emissivity as a function of salinity, foam thickness, incidence angle, and polarization. Experimental results are presented, and then compared to the two-layer foam emission model with the measured foam parameters used as input model parameters. At 37 psu salt water the foam-induced emissivity increase is 0.007 per millimeter of foam thickness (extrapolated to nadir), increasing with increasing incidence angles at vertical polarization, and decreasing with
CitationCamps, A. [et al.]. The emissivity of foam-covered water surface at L-band: theoretical modeling and experimental results from the FROG 2003 field experiment. "IEEE transactions on geoscience and remote sensing", Maig 2005, vol. 43, núm. 5, p. 925-937. 
URIhttp://hdl.handle.net/2117/10108
DOI10.1109/TGRS.2004.839651
ISSN0196-2892
Publisher versionhttp://hdl.handle.net/2117/1045
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  • Departament de Teoria del Senyal i Comunicacions - Articles de revista [2.351]
  • RSLAB - Remote Sensing Research Group - Articles de revista [614]
  • RF&MW - Grup de Recerca de Sistemes, Dispositius i Materials de RF i Microones - Articles de revista [199]
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