Data/hora: 06/06/2024 00:47:25

Provedor de dados: 	5	
País: 	France	
Título: 	GNSS-R nonlocal sea state dependencies: Model and empirical verification	
Autores: 	Chen-zhang, David D.; Ruf, Christopher S.; Ardhuin, Fabrice; Park, Jeonghwan.	
Data: 	2016-11	
Ano: 	2016	
Palavras-chave: 	Waves; Wind; Remote sensing.	
Resumo: 	Global Navigation Satellite System Reflectometry (GNSS-R) is an active, bistatic remote sensing technique operating at L-band frequencies. GNSS-R signals scattered from a rough ocean surface are known to interact with longer surface waves than traditional scatterometery and altimetry signals. A revised forward model for GNSS-R measurements is presented which assumes an ocean surface wave spectrum that is forced by other sources than just the local near-surface winds. The model is motivated by recent spaceborne GNSS-R observations that indicate a strong scattering dependence on significant wave height, even after controlling for local wind speed. This behavior is not well represented by the most commonly used GNSS-R scattering model, which features a one-to-one relationship between wind speed and the mean-square-slope of the ocean surface. The revised forward model incorporates a third generation wave model that is skillful at representing long waves, an anchored spectral tail model, and a GNSS-R electromagnetic scattering model. In comparisons with the spaceborne measurements, the new model is much better able to reproduce the empirical behavior.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00358/46909/46809.pdf

DOI:10.1002/2016JC012308

http://archimer.ifremer.fr/doc/00358/46909/	
Editor: 	Amer Geophysical Union	
Formato: 	application/pdf	
Fonte: 	Journal Of Geophysical Research-oceans (2169-9275) (Amer Geophysical Union), 2016-11 , Vol. 121 , N. 11 , P. 8379-8394	
Fonte: 	2016. American Geophysical Union. All Rights Reserved.

info:eu-repo/semantics/openAccess

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