Remote-controlled trimaran Ocarina (Océan couplé à l'atmosphère : recherche instrumentée sur navire annexe / Ocean coupled to the atmosphere: instrumented research on an auxiliary ship).
The OCARINA platform (Ocean Coupled to the Atmosphere, Research on the Interface on the Annex Ship) is a surface naval drone specifically developed to measure turbulent and radiative exchanges at the ocean/atmosphere interface.
Designed and produced at LATMOS in 2009, the initial version of OCARINA has evolved through campaigns and collaborations with DT-INSU, ENSTA-Paris, Ifremer, LOCEAN, and IRPHE.
The onboard instruments are an inertial unit, a GPS, a sonic anemometer, a probe for measuring rising and falling radiative flows in the infrared and in visible wavelengths, a submerged probe of the CT type, and a meteorological station.
The level 2 data provided are:
- the location, speed, heading and route followed
- the height and significant period of waves longer than two meters
- the water temperature (SST) at a depth of 30 cm
- surface salinity (SSS)
- the meteorological variables (wind in modulus and direction, temperature, humidity and pressure) at one meter high.
- solar and infrared fluxes up and down
- turbulent bulk flows (u*, Hs and LE), and Monin-Obukhov's ratio (z/L)
- u* and Hsv (the turbulent buoyancy flux) estimated by the inertio dissipative method
- u* and Hsv estimated by covariance method
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OCARINA (Ocean coupled to the atmosphere: instrumented research on an auxiliary ship)