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:

• Jason-3 Product handbook, SALP-MU-M-OP-16118-CN, edition 1.5, Sept. 2018
• SARAL/AltiKa Products handbook, SALP-MU-M-OP-15984-CN, edition 2.5, July 2016
• OSTM/Jason-2 Products handbook, SALP-MU-M-OP-15815-CN, edition 1.11, Jan.2017
• Jason-1 Products Handbook, SMM-MU-M5-OP-13184-CN, Edition 5.1, April 2016 (pdf, 9Mo)
• Aviso User Handbook: Merged Topex/Poséidon Products, AVI-NT-02-101-CN, Edition 3.0, July 1996 (pdf, 900 KB)

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
Condition of use: please refer to the Licence Agreement

Dissemination:
We inform all the users that the ftp dissemination of the Geophysical Data Records (S/I/GDRs for Jason-1, Jason-2, Jason-3, Saral  and OGDRs for Saral) products is gradually being transferred to the authenticated AVISO+ ftp portal  (ftp://ftp-access.aviso.altimetry.fr/). It is thus foreseen to stop the previous access (ftp://avisoftp.cnes.fr/AVISO/pub/) by September 12^th. 

Note that the deliveries on the Online Data Extraction Service (ODES) and the AVISO+ Cnes Data Center remain unchanged.

Current data:
Since June 20th, the operational chain has been delivering the data for the current missions on both AVISO+ ftp portals, allowing the operational users to switch to the authenticated AVISO+ ftp server as soon as possible. 
The double dissemination is planned until 12^th  September 2019.

Historical data:
For the moment, the historical data (past and current missions) is still available only on ftp://avisoftp.cnes.fr/AVISO/pub/ and in August, we will trasnfer the whole historical data on the authenticated Aviso+ ftp portal (ftp://ftp-access.aviso.altimetry.fr). 

Thus, the same data will be available on both portals until September 12^th. After September 12^th, the Geophysical Data Records products will be available only at the authenticated Aviso+ ftp portal (ftp://ftp-access.aviso.altimetry.fr/). 

AVISO+ registration:
If you are not registered, we invite you to fill the form on the AVISO+ web portal to get your credentials as soon as possible. You can consult our FAQ for any information about the registration.
If you are already registered but you haven't these products in your list, we invite you to ask for a new product: you can consult our FAQ for any information.

GDR (delayed-time): Geophysical Data Record

Copyright : 2013-ongoing Cnes for IGDR Saral/AltiKa data , 2008-ongoing Cnes for Jason-2 data, 2002-ongoing Cnes and Nasa for Jason-1, 2002-2012 Esa for Envisat data, 1992-2005 Cnes and Nasa for T/P GDR data, 2016-ongoing CNES for Jason-3

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

See also Wind / Wave products available on the Catalogue

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

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

OGDR (real time) : Operational Geophysical data record

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.