Ocean colour validation float

A new type of profiling float has been developed in the framework of the ProVal project funded by the CNES (Centre National d'Etudes Spatiales).

The purpose of this project is to use profiling floats to extend the temporal and the spatial resolution of the in-situ validation of Ocean Color remote sensing products. The ProVal float is based on the new PROVOR CTS5, developed by NKE in collaboration with the LOV, equipped with a new and powerful acquisition board developed by the LOV and OSEAN company. The ProVal float is specifically instrumented with two identical Ed-Lu combos (7λs : 400, 412, 443, 490, 510, 560, 665 nm) from SATLANTIC deported on the side of the float. This configuration will minimize the self-shading and allows data inter-comparison between both sensors for long terms deployments.

The first ProVal float has been deployed around the BOUSSOLE Buoy in July 2014 for testing. First radiance, irradiance and tilt profiles have been recorded showing a very good data quality and profiler stability. Short deployments will continue in 2014 and 2015 to explore optical anomalies in the Ligurian Sea.

Irradiance, radiance and tilt profiles at depth around the Boussole Mooring. Profile 32-2 (13/07/2014, 11H03 GMT).