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Description: produit altimétrique combiné calculé sur une période de 29 ans (1993-2021), basé sur des mesures altimétriques (profils moyens, phase géodésiques et anomalies de hauteurs de mer) des missions comme Topex/Poséidon, Jason-1&amp;2, GFO, ERS-1&amp;2 Envisat et Cryosat-2. La combinaison des missions nécessite de recaler les missions entre elles. Pour cela une mission de référence est choisie et les autres sont calées sur elle. La mission Topex/Poséidon est prise comme référence pour le biais absolu.
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