Journal articles
New observations from the SWIM radar on board CFOSAT: instrument validation and ocean wave measurement assessment
Danièle Hauser
1
Cedric Tourain
2
Laura Hermozo
2
Dunya Alraddawi
1
Lotfi Aouf
3
Bertrand Chapron
4
Alice Dalphinet
3
Lauriane Delaye
5
Maeva Dalila
6
Emmanuel Dormy
7
Flavien Gouillon
2
Victor Gressani
4
Antoine Grouazel
4
Gilles Guitton
8
Romain Husson
6
Alexey Mironov
Alexis Mouche
9
Annabelle Ollivier
6
Ludivine Oruba
10
Fanny Piras
6
Raquel Rodriguez-Suquet
2
Patricia Schippers
1
Céline Tison
2
Ngan T. Tran
6
Danièle Hauser 1
Mail :
Author IdHAL : daniele-hauser ORCID : https://orcid.org/0000-0001-9478-670X
Cedric Tourain 2
Mail :
Author Employer institution : Centre National d'Études Spatiales [Toulouse]
Laura Hermozo 2
Author
Dunya Alraddawi 1
Mail :
Author IdHAL : dunya-alraddawi
Lotfi Aouf 3
Author
Bertrand Chapron 4
Mail :
Author
Alice Dalphinet 3
Mail :
Author
Lauriane Delaye 5
Mail :
Author IdHAL : lauriane-delaye
Maeva Dalila 6
Author Employer institution : Collecte Localisation Satellites
Emmanuel Dormy 7
Mail :
Author IdHAL : emmanuel-dormy ORCID : https://orcid.org/0000-0002-9683-6173
Flavien Gouillon 2
Mail :
Author
Victor Gressani 4
Mail :
Author Employer institution : Centre National d'Études Spatiales [Toulouse]
Antoine Grouazel 4
Mail :
Author IdHAL : antoine-grouazel ORCID : https://orcid.org/0000-0002-9113-9467
Gilles Guitton 8
Author
Romain Husson 6
Author
Alexey Mironov
Mail :
Author Employer institution : ODL - OceanDataLab
Alexis Mouche 9
Mail :
Author Employer institution : Institut Français de Recherche pour l'Exploitation de la Mer
Annabelle Ollivier 6
Mail :
Author Employer institution : Collecte Localisation Satellites (CLS Argos)
Ludivine Oruba 10
Mail :
Author
Fanny Piras 6
Author Employer institution : Collecte Localisation Satellites (CLS Argos)
Raquel Rodriguez-Suquet 2
Author
Patricia Schippers 1
Mail :
Author
Céline Tison 2
Author Employer institution : Centre National d'Études Spatiales [Toulouse]
Ngan T. Tran 6
Author Employer institution : Collecte Localisation Satellites
1
SPACE - LATMOS (France)
- LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales (11 boulevard d'Alembert
Quartier des Garennes
78280 - Guyancourt - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR8190 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8190 (France)
- UVSQ - Université de Versailles Saint-Quentin-en-Yvelines : UMR8190 (55 avenue de Paris - 78035 Versailles cedex - France)
- SU - Sorbonne Université : UMR8190 (21 rue de l’École de médecine - 75006 Paris - France)
2
CNES - Centre National d'Études Spatiales [Toulouse] (18 avenue Edouard Belin 31401 Toulouse - France)
3
Météo France (France)
4
LOPS - Laboratoire d'Océanographie Physique et Spatiale (Rue Dumont D'Urville, 29280 Plouzané - France)
- IRD - Institut de Recherche pour le Développement (Siège Le Sextant 44, bd de Dunkerque CS 90009 13572 Marseille cedex 02 - France)
- IFREMER - Institut Français de Recherche pour l'Exploitation de la Mer (155, rue Jean-Jacques Rousseau - 92 138 Issy-les-Moulineaux Cedex - France)
- UBO - Université de Brest (Université de Bretagne Occidentale - 3 Rue des Archives 29238, Brest - France)
- CNRS - Centre National de la Recherche Scientifique (France)
5
ACRI-ST - Analytic and Computational Research, Inc. - Earth Sciences (260 route du Pin Montard 06904 Sophia-Antipolis - France)
6
CLS - Collecte Localisation Satellites (Brest - France)
- IFREMER - Institut Français de Recherche pour l'Exploitation de la Mer (155, rue Jean-Jacques Rousseau - 92 138 Issy-les-Moulineaux Cedex - France)
- CNES - Centre National d'Études Spatiales [Toulouse] (18 avenue Edouard Belin 31401 Toulouse - France)
7
FRDPENS - Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (24 Rue Lhomond 75251 PARIS CEDEX 05 - France)
- CNRS - Centre National de la Recherche Scientifique : FR684 (France)
- ENS Paris - École normale supérieure - Paris (45, Rue d'Ulm - 75230 Paris cedex 05 - France)
8
OceanDataLab (870 route de Deolen, 29280 Locmaria-Plouzané - France)
9
IFREMER - Institut Français de Recherche pour l'Exploitation de la Mer - Brest ( Pointe du Diable, 29280 Plouzané - France)
- IFREMER - Institut Français de Recherche pour l'Exploitation de la Mer (155, rue Jean-Jacques Rousseau - 92 138 Issy-les-Moulineaux Cedex - France)
10
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales (11 boulevard d'Alembert
Quartier des Garennes
78280 - Guyancourt - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR8190 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8190 (France)
- UVSQ - Université de Versailles Saint-Quentin-en-Yvelines : UMR8190 (55 avenue de Paris - 78035 Versailles cedex - France)
- SU - Sorbonne Université : UMR8190 (21 rue de l’École de médecine - 75006 Paris - France)
Abstract : This paper describes first results obtained from the SWIM (Surface Waves Investigation and Monitoring) instrument carried by CFOSAT (China France Oceanography Satellite), which was launched on October 29th, 2018. SWIM is a Ku-Band radar with a near-nadir scanning beam geometry. It was designed to measure the spectral properties of surface ocean waves. First, the good behavior of the instrument is illustrated. It is then shown that the nadir products (significant wave height, normalized radar cross-section and wind speed) exhibit an accuracy similar to standard altimeter missions, thanks to a new retracking algorithm, which compensates a lower sampling rate compared to standard altimetry missions. The off-nadir beam observations are analyzed in details. The normalized radar cross-section varies with incidence and wind speed as expected from previous studies presented in the literature. We illustrate that, in order to retrieve the wave spectra from the radar backscattering fluctuations, it is crucial to apply a speckle correction derived from the observations. Directional spectra of ocean waves and their mean parameters are then compared to wave model data at the global scale and to in situ data from a selection of case studies. The good efficiency of SWIM to provide the spectral properties of ocean waves in the wavelength range [70m-500m] is illustrated. The main limitations are discussed, and the perspectives to improve data quality are presented.
Document type :
Journal articles
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https://hal-insu.archives-ouvertes.fr/insu-02324383
Contributor : Danièle Hauser <>
Submitted on : Thursday, June 4, 2020 - 11:25:53 AM
Last modification on : Friday, June 12, 2020 - 12:20:30 PM
Contributor : Danièle Hauser <>
Submitted on : Thursday, June 4, 2020 - 11:25:53 AM
Last modification on : Friday, June 12, 2020 - 12:20:30 PM
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- HAL Id : insu-02324383, version 2
- DOI : 10.1109/TGRS.2020.2994372
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INSU | UNIV-BREST | METEO | IUEM | LATMOS | UVSQ | THESES_IUEM | SU-SCIENCES | IRD | LOPS | ENS-PARIS | SORBONNE-UNIVERSITE | PSL | UNIV-PARIS-SACLAY | CNRS
Citation
Danièle Hauser, Cedric Tourain, Laura Hermozo, Dunya Alraddawi, Lotfi Aouf, et al.. New observations from the SWIM radar on board CFOSAT: instrument validation and ocean wave measurement assessment. IEEE Transactions on Geoscience and Remote Sensing, Institute of Electrical and Electronics Engineers, 2020, ⟨10.1109/TGRS.2020.2994372⟩. ⟨insu-02324383v2⟩
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