Improved CYGNSS Wind Speed Retrieval Using Significant Wave Height Correction

This article presents the methodology for an improved estimation of the sea surface wind speed measured by the cyclone global navigation satellite system (CYGNSS) constellation of satellites using significant wave height (SWH) information as external reference data. The methodology consists of a cor...

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Autores principales:	Daniel Pascual, Maria Paola Clarizia, Christopher S. Ruf
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	GNSS reflectometry CYGNSS wind speed significant wave height Science Q
Acceso en línea:	https://doaj.org/article/3a5f6043c18e4b4383e028373ad28a80
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spelling	oai:doaj.org-article:3a5f6043c18e4b4383e028373ad28a802021-11-11T18:53:42ZImproved CYGNSS Wind Speed Retrieval Using Significant Wave Height Correction10.3390/rs132143132072-4292https://doaj.org/article/3a5f6043c18e4b4383e028373ad28a802021-10-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/21/4313https://doaj.org/toc/2072-4292This article presents the methodology for an improved estimation of the sea surface wind speed measured by the cyclone global navigation satellite system (CYGNSS) constellation of satellites using significant wave height (SWH) information as external reference data. The methodology consists of a correcting 2D look-up table (LUT) with inputs: (1) the CYGNSS wind speed given by the geophysical model function (GMF); and (2) the collocated reference SWH given by the WW3 model, which is forced by winds from the European Centre for Medium-Range Weather Forecasts (ECMWF) organization. In particular, the analyzed CYGNSS wind speeds are the fully developed seas (FDS) obtained with the GMF 3.0, and the forcing winds are the ECMWF forecast winds. Results show an increase in sensitivity to large winds speeds and an overall reduction in the root mean square difference (RMSD) with respect to the ECMWF winds from 2.05 m/s to 1.74 m/s. The possible influence of the ECWMF winds on the corrected winds (due to their use in the WW3 model) is analyzed by considering the correlation between: (1) the difference between the ECMWF winds and those from another reference; and (2) the difference between the corrected CYGNSS winds and those from the same reference. Results using ASCAT, WindSat, Jason, and AltiKa as references show no significant influence.Daniel PascualMaria Paola ClariziaChristopher S. RufMDPI AGarticleGNSS reflectometryCYGNSSwind speedsignificant wave heightScienceQENRemote Sensing, Vol 13, Iss 4313, p 4313 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	GNSS reflectometry CYGNSS wind speed significant wave height Science Q
spellingShingle	GNSS reflectometry CYGNSS wind speed significant wave height Science Q Daniel Pascual Maria Paola Clarizia Christopher S. Ruf Improved CYGNSS Wind Speed Retrieval Using Significant Wave Height Correction
description	This article presents the methodology for an improved estimation of the sea surface wind speed measured by the cyclone global navigation satellite system (CYGNSS) constellation of satellites using significant wave height (SWH) information as external reference data. The methodology consists of a correcting 2D look-up table (LUT) with inputs: (1) the CYGNSS wind speed given by the geophysical model function (GMF); and (2) the collocated reference SWH given by the WW3 model, which is forced by winds from the European Centre for Medium-Range Weather Forecasts (ECMWF) organization. In particular, the analyzed CYGNSS wind speeds are the fully developed seas (FDS) obtained with the GMF 3.0, and the forcing winds are the ECMWF forecast winds. Results show an increase in sensitivity to large winds speeds and an overall reduction in the root mean square difference (RMSD) with respect to the ECMWF winds from 2.05 m/s to 1.74 m/s. The possible influence of the ECWMF winds on the corrected winds (due to their use in the WW3 model) is analyzed by considering the correlation between: (1) the difference between the ECMWF winds and those from another reference; and (2) the difference between the corrected CYGNSS winds and those from the same reference. Results using ASCAT, WindSat, Jason, and AltiKa as references show no significant influence.
format	article
author	Daniel Pascual Maria Paola Clarizia Christopher S. Ruf
author_facet	Daniel Pascual Maria Paola Clarizia Christopher S. Ruf
author_sort	Daniel Pascual
title	Improved CYGNSS Wind Speed Retrieval Using Significant Wave Height Correction
title_short	Improved CYGNSS Wind Speed Retrieval Using Significant Wave Height Correction
title_full	Improved CYGNSS Wind Speed Retrieval Using Significant Wave Height Correction
title_fullStr	Improved CYGNSS Wind Speed Retrieval Using Significant Wave Height Correction
title_full_unstemmed	Improved CYGNSS Wind Speed Retrieval Using Significant Wave Height Correction
title_sort	improved cygnss wind speed retrieval using significant wave height correction
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3a5f6043c18e4b4383e028373ad28a80
work_keys_str_mv	AT danielpascual improvedcygnsswindspeedretrievalusingsignificantwaveheightcorrection AT mariapaolaclarizia improvedcygnsswindspeedretrievalusingsignificantwaveheightcorrection AT christophersruf improvedcygnsswindspeedretrievalusingsignificantwaveheightcorrection
_version_	1718431696290840576

Improved CYGNSS Wind Speed Retrieval Using Significant Wave Height Correction

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