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Remote sensing techniques appear to be the most efficient way to monitor extreme events, as these low pressure systems evolve in data-sparse oceanic regions. IFREMER team is working on algorithms to retrieve geophysical parameters over such events. Recent work has been devoted to the use of L-band radiometer and C-band Synthetic Aperture Radar (SAR) for providing an estimate of the ocean surface wind speed. CyclObs aims to present this unique catalogue of measurements. CyclObs database is divided in three different subsets : Tropical storms (TC), Extra Tropical storms (ETC) and Polar lows (PL).