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GDR (Geophysical Data Records)

Contents: along-track altimetric measurements averaged over 1 second, corrections to apply in delayed time (GDR), near-real time (IGDR) or real-time (OGDR)
Use: geophysical studies, operational oceanography (near-real time)
Description : for Topex/Poseidon (M-GDR), data are homogeneous between Topex and Poseidon-1 altimeters
Check monomossion processing last updates.
Geographic coverage Global
Tools:

Copyright : 1992-2005 Cnes and Nasa for T/P (I)GDR data, 2002-ongoing Cnes and Nasa for Jason-1, 2002-2012 Esa for Envisat data, 2008-ongoing Cnes for Jason-2 data, 2013-ongoing Cnes for IGDR Saral/AltiKa data and Isro/Eumetsat for OGDR Saral/AltiKa data

GDR (delayed time)

SatelliteDistribution mediaFrequencyDelivery delayData periodData usedFile weight
Jason-3FTPevery 10 days2 monthsFeb. 2016 - ongoingOne pass per file4 MB per file (zipped)
SaralFTP
ODES
every 35 days2 monthsMar 2013-ongoingOne pass per file5.5 MB per pass file (zipped)
Jason-2

FTP
ODES

every 10 days 2 months Jun 2008 - ongoing One pass per file 5 MB per pass file
(zipped)
Jason-1FTP
ODES
every 10 days - Jan 2002 - Jun 2013 One pass per file 1.3 MB per pass file
Envisatplease contact EOHelp (ESA)every 35 days-Apr 2003 - Oct 2010One pass per file1.3 MB per pass file
T/PCD Rom - -Oct 1992 - Dec 2003 One pass per file0.7 MB per pass file
DVD Rom GDR - Dec 2003 - Oct 2005

See also GDR products available on the catalogue (through menu DATA) 

IGDR (near-real time) : Interim Geophysical data record

SatelliteDistribution mediaFrequencyDelivery delayData periodData usedFile weight
Jason-3FTP
ODES

every day1 to 2 dayslast month onlineOne pass per file4 MB per pass file (zipped)
SaralFTP
ODES
every day1 to 2 dayslast month onlineOne pass per file5-6 MB per pass file (zipped)
Jason-2

FTP
ODES

every day1 to 2 dayslast month onlineOne pass per file2-3 MB per pass file
(zipped)

See also IGDR products available on the catalogue (through menu DATA)

OGDR (real time) : Operational Geophysical data record

SatelliteDistribution mediaFrequencyDelivery delayData periodData usedFile weight
SaralFTPseveral times per day3 to 5 hours per daylast month onlineOne pass per file10-11 MB per file (zipped)

See also OGDR products available on the catalogue (through menu DATA)
Note: the official dissemination of SARAL OGDR products is under the responsibilty of EUMETSAT and ISRO. CNES declines any responsability in case of products latency or gaps happening on the ftp server.

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