Envisat V2.1

The reprocessing of Envisat GDR cycles 10 to 92 in 2.1 version was done in 2011-2012 (the cycles 93 and onwards are not concerned by this reprocessing since they are already in version 2.1). The changes and comparisons between the old and new version are available: Ollivier A, J.F. Legeais, N. Granier, Y. Faugere, F-PAC Calval Team: "CalVal status on the Envisat V2.1 reprocessing impact on main altimetric parameters"