QUASI-STATIONARY SST ESTIMATION IN THE EASTERN MEDITERRANEAN SEA USING MARINE GRAVITY, GOCE/GRACE GRAVITY INFORMATION AND RECENT ALTIMETRY MISSIONS THROUGH THE MULTIPLE INPUT / MULTIPLE OUTPUT SYSTEM THEORY

摘要

The Multiple Input / Multiple Output System (MIMOS)rnTheory is used in the spectral combination of marinernand satellite data for Quasi-stationary Sea SurfacernTopography (QSST) estimation. 15 years (2000 – 2015)rnof altimetric data from ERS2, GEOSAT FOLLOW-ON,rnENVISAT and SARAL / Altika satellites are optimallyrncombined with in situ marine gravity observations. Thernrepeated character of the altimetric missions providesrnmore than one sample of Sea Surface Height (SSH) datarnsets, and the approximation of the input signal andrnoutput error power spectral densities is feasible usingrnthis successive information. The assimilation of lowrnfrequency global gravity information fromrnGOCE/GRACE satellites is considered in datarnreductions. The geodynamically active area of thernEastern Mediterranean Sea is chosen as test area and thernevolution of yearly SST is presented.