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:
- 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
GDR (delayed time)
| Satellite | Distribution media | Frequency | Delivery delay | Data period | Data used | File weight |
|---|---|---|---|---|---|---|
| Jason-3 | FTP | every 10 days | 2 months | Feb. 2016 - ongoing | One pass per file | 4 MB per file (zipped) |
| Saral | FTP ODES | every 35 days | 2 months | Mar 2013-ongoing | One pass per file | 5.5 MB per pass file (zipped) |
| Jason-2 | every 10 days | 3 months | Jun 2008 - ongoing | One pass per file | 5 MB per pass file (zipped) | |
| Jason-1 | FTP ODES | every 10 days | - | Jan 2002 - Jun 2013 | One pass per file | 1.3 MB per pass file |
| Envisat | please contact EOHelp (ESA) | every 35 days | - | Apr 2003 - Oct 2010 | One pass per file | 1.3 MB per pass file |
| T/P | CD Rom | - | - | Oct 1992 - Dec 2003 | One pass per file | 0.7 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
| Satellite | Distribution media | Frequency | Delivery delay | Data period | Data used | File weight |
|---|---|---|---|---|---|---|
| Jason-3 | FTP ODES | every day | 1 to 2 days | last month online | One pass per file | 4 MB per pass file (zipped) |
| Saral | FTP ODES | every day | 1 to 2 days | last month online | One pass per file | 5-6 MB per pass file (zipped) |
| Jason-2 | every day | 1 to 2 days | last month online | One pass per file | 2-3 MB per pass file (zipped) |
See also IGDR products available on the catalogue (through menu DATA)
OGDR (real time) : Operational Geophysical data record
| Satellite | Distribution media | Frequency | Delivery delay | Data period | Data used | File weight |
|---|---|---|---|---|---|---|
| Saral | FTP | several times per day | 3 to 5 hours per day | last month online | One pass per file | 10-11 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.
Data
- Products guide.
Products .- Sea surface height products .
- Global .
- SSALTO/DUACS Experimental products.
- Gridded Sea Level Heights and derived variables.
- Along-track Sea Level Heights.
- Gridded Sea Level Anomalies - Mean and Climatology.
- SSHA.
- Along-track Sea Level Anomalies (L2P).
- GDR, IGDR and OGDR.
- Experimental enhanced GDR.
- Coastal and Hydrological products.
- Experimental Saral products (Peachi).
- Waveforms.
- Regional .
- Value-added products .
- Wind/wave products .
- Auxiliary products .
- Ocean indicators products .
- In-situ products .
- Data access .
- Tools .
- Product information .
- CALVAL .
- Operational information .
