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Directional and Frequency Spread of Surface Ocean Waves from CFOSAT/SWIM Measurements

E. Le Merle, D. Hauser, C. Peureux, L. Aouf, P. Schippers, C. Dufour
2021 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS  
Here we show that the parameters characterizing the shape of the wave spectra (e.g directional and frequency spread) can be estimated at the global scale from the SWIM measurements.  ...  From the ocean wave spectra derived from SWIM, the principal parameters of ocean wave spectra as significant wave height, peak wavelength, and peak direction are now available to better characterize the  ...  INTRODUCTION Ocean surface waves are commonly described by their directional density spectrum of height, which characterizes the distribution of wave energy as a function of wave frequency (or wave number  ... 
doi:10.1109/igarss47720.2021.9553868 fatcat:v5q5seta5vbqpfzycnu3ulpphi

Up-to-Downwave Asymmetry of the CFOSAT SWIM Fluctuation Spectrum for Wave Direction Ambiguity Removal

Huimin Li, Daniele Hauser, Bertrand Chapron, Frederic Nouguier, Patricia Schippers, Biao Zhang, Jingsong Yang, Yijun He
2021 IEEE Transactions on Geoscience and Remote Sensing  
The surface waves investigation and monitoring (SWIM) aboard the China-France Oceanography Satellite (CFOSAT), a pioneer conically scanning wave spectrometer, was successfully launched on October 29, 2018  ...  Its innovative configuration composed of one nadir and 5 rotating near-nadir beams is designed to simultaneously observe the directional wave spectrum at global scale.  ...  ACKNOWLEDGMENT We would like to acknowledge the CNSA and CNES for providing the CFOSAT/SWIM Level-1A and Level-1B products, which can be publicly downloaded via https://www.aviso.altimetry.fr/en/missions  ... 
doi:10.1109/tgrs.2021.3086483 fatcat:f6sj4d33tnevdivokkhvnpgvgi

Numerical Simulation and Observational Data Analysis of Mesoscale Eddy Effects on Surface Waves in the South China Sea

Jin Wang, Brandon J. Bethel, Changming Dong, Chunhui Li, Yuhan Cao
2022 Remote Sensing  
In addition, China–France Oceanography SATellite Surface Wave Investigation and Monitoring (CFOSAT-SWIM) observational data of a large warm-cored eddy in the South China Sea (SCS) during the period of  ...  Surface current velocities of mesoscale eddies have a unique annular structure, which can inevitably influence surface wave properties and energy distribution.  ...  The authors also thank the Editor for the kind assistances and beneficial comments. The authors are grateful for the kind support from the editorial office.  ... 
doi:10.3390/rs14061463 fatcat:4sdricy72vep7myupqg5csc2fi

A generalized simulation capability for rotating- beam scatterometers

Zhen Li, Ad Stoffelen, Anton Verhoef
2019 Atmospheric Measurement Techniques  
performance from three aspects: wind vector root mean square error, ambiguity susceptibility, and wind biases.  ...  The evaluation shows that, overall, the wind retrieval quality of the three instruments can be ranked from high to low as WindRad, SCAT, and SeaWinds, where the wind retrieval quality strongly depends  ...  This work was supported by the project of "the development and provision of scatterometer wind processing software and wind products for the China France Oceanography SATellite (CFOSAT)" between CNES (  ... 
doi:10.5194/amt-12-3573-2019 fatcat:jcn6buez7bfq3dxeu7xd4d3x2a

A Generalized Simulation Capability for Rotating Beam Scatterometers

Zhen Li, Ad Stoffelen, Anton Verhoef
2018 Atmospheric Measurement Techniques Discussions  
performance from three aspects: wind vector root mean square error, ambiguity susceptibility, and wind biases.  ...  The evaluation shows that, overall, the wind retrieval quality of the three instruments can be ranked from high to low as WindRad, SCAT, and SeaWinds, where the wind retrieval quality strongly depends  ...  Acknowledgments: This work was supported by the project of 'the development and provision of scatterometer wind processing software and wind products for the China-France Oceanography SATellite (CFOSAT  ... 
doi:10.5194/amt-2018-232 fatcat:xrjm4zjqbbdidhu3zq6a4uo5lq

2D ocean waves spectra from space: a challenge for validation and synergetic use

A. Mouche, H. Wang, R. Husson, G. Guitton, B. Chapron, H. Li, Robert J. Frouin, Satheesh C. Shenoi, K. H. Rao
2016 Remote Sensing of the Oceans and Inland Waters: Techniques, Applications, and Challenges  
This paper focuses on the techniques used to validate 2D-ocean waves as measured by satellite and the challenges and opportunities of such a program for ocean waves measurements from space.  ...  In particular, Sentinel-1A wave measurements provide 2D ocean swell spectra (2D wave energy distribution as a function of wavelength and direction) as well as integrated parameters such as significant  ...  Under this assumption only phenomena modifying the swell energy during the propagation are (i) are angular spreading, acting in transverse direction, and frequency dispersion, acting in radial direction  ... 
doi:10.1117/12.2227178 fatcat:oksbxlnxzvhw5mcj5n62um2p6q

CFOSAT: a new Chinese-French satellite for joint observations of ocean wind vector and directional spectra of ocean waves

D. Hauser, C. Tison, T. Amiot, L. Delaye, A. Mouche, G. Guitton, L. Aouf, P. Castillan, Robert J. Frouin, Satheesh C. Shenoi, K. H. Rao
2016 Remote Sensing of the Oceans and Inland Waters: Techniques, Applications, and Challenges  
The concept used to measure the directional spectra of ocean waves has never been used from space until now: it is based on a near-nadir incidence pointing, rotating fan-beam radar, used in a real-aperture  ...  CFOSAT (the China France Oceanography Satellite) is a joint mission from the Chinese and French Space Agencies, devoted to the observation ocean surface wind and waves so as to improve wind and wave forecast  ...  For the very first time, both wind and wave vectors will be measured at the global ocean surface.  ... 
doi:10.1117/12.2225619 fatcat:p3camibravdthffglu46nayrg4

2D parametric model for surface wave development under varying wind field in space and time

Vladimir Kudryavtsev, Maria Yurovskaya, Bertrand Chapron
2021 Journal of Geophysical Research - Oceans  
An efficient and ready-to-use statistical description of the surface gravity wavefield, especially its directional energy characteristics, is often needed for many engineering and scientific applications  ...  For instance, practical models can help to rapidly anticipate and document the role of partial resonance effects to increase the effective fetch and duration of the wave-growth process in the main direction  ...  in situ buoy and remote sensing measurements (e.g., Collard et al., 2009) , including the recently launched China-France Ocean Satellite (CFOSAT) SWIM KUDRYAVTSEV ET AL. u is the dimensionless fetch,  ... 
doi:10.1029/2020jc016915 fatcat:xxwrg267afhvbftwm5fsdx3ogq