This image, which shows part of the Mediterranean Sea, was processed from data collected during the Sen3Exp campaign to support the development of ESA's Sentinel-3 mission. It is based on MERIS data when the instrument was reprogrammed to some of the new Ocean and Land Colour Instrument (OLCI) bands and processed to simulate OLCI products.
The image shows radiance in the new OLCI band at 400 nm. This new band will improve the detection of phytoplankton in water and determination of land cover types.