Restitution de la température de la mer à partir des données du satellite NOAA/AVHRR

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Abstract
This paper reviews first the basic problems raised by the Sea Surface Temperature (SST) restitution from A VHRR data, and the solutions adopted at CMS. In particular some results concerning the split window lagorithm errors at large satellite zenith angle will be discussed. Its lain topic concerns however the techniques Used in the operational small scale SST restitution at CMS. The objective of this activity is to provide the French Navy, the océanographie campaigns and some fishing activities with real time or climatological concerning the sea surface temperatures over the European seas. Six zones (2 000 * 2 000 km) have been defined inside the CMS acquisition circle : North Sea, Biscay, Canary Islands, Western Mediterranean, Eastern Mediterranean, Norwegian Sea. After preprocessing on the main computer, each zone (corresponding after sampling and mapping onto a stereopolar grid to a 1 024 * 1 024 pixel image) is analysed, every day, on the image processing system. Various studies or products are based on this processing suite, ranging from daily, weekly (etc.) charts to the making of an SST Atlas over Europe.

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