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CFOSAT : A New Satellite for Ocean/Atmosphere Interaction Research and Operational Oceanography

Abstract : The Chinese and French Space Agencies are jointly preparing an innovative satellite mission, CFOSAT (China France Oceanography Satellite) devoted to the monitoring of the ocean surface and its related science and operational applications. CFOSAT will provide global observations of surface wind and spectral characteristics of the surface ocean waves (energy as a function of direction and wavelength) by using a combination of nadir, near-nadir (2°-10°) and off-nadir (20-50°) Ku-Band measurements in a azimuthally rotating geometry. The objective is multifold. It will serve both operational needs for the meteorological (NWP) and wave forecast, and research needs to improve our knowledge on the hydrodynamics of the waves, on the interactions between waves and the atmospheric or oceanic layers close to the surface. WIth CFOSAT, for the very first time, both wind and wave vectors will be measured at the global ocean surface. This will be achieved thanks to the two-instruments, both of them being innovative instruments in terms of geometry and design: - SWIM (Surface Wave Investigation and Monitoring) a near-nadir (nadir beam and 2 to 10° incidence beams) real-aperture Ku-Band azimuthally scanning radar designed for measuring the directional spectra of ocean waves, - SCAT a wind scatterometer SCAT to measure the wind vector, radar in Ku-Band aiming at moderate incidence angles (26° to 46°) with a rotating fan-beam antenna Both payloads are presently under assembly and test. The satellite will be launched in September 2018. During the conference we will point out the originality of these measurements, their complementarity with other existing satellite observations, (in particular altimeter measurements) and their interest for research on the wave modulated air/sea exchanges. Expected improvements on operational wave forecasting will be also addressed. We will also show results based on simulated products.
Document type :
Poster communications
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https://hal-insu.archives-ouvertes.fr/insu-02324602
Contributor : Danièle Hauser <>
Submitted on : Tuesday, October 22, 2019 - 12:42:59 AM
Last modification on : Friday, January 10, 2020 - 3:42:35 PM

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  • HAL Id : insu-02324602, version 1

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Danièle Hauser, Céline Tison, Alexis Mouche, Lotfi Aouf, Bertrand Chapron, et al.. CFOSAT : A New Satellite for Ocean/Atmosphere Interaction Research and Operational Oceanography. 25 Years of Progress in Radar Altimetry, Sep 2018, São Miguel Island (Azores Archipelago), Portugal. ⟨insu-02324602⟩

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