Products
GDR (Geophysical Data Records)
Contents: along-track altimetric measurements averaged over 1 second, corrections to apply in delayed time (GDR) or near-real time (IGDR)
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:
- OSTM / Jason-2 Products Handbook
- Aviso User Handbook: Merged Topex/Poseidon Products, AVI-NT-02-101-CN, Edition 3.0, July 1996 (pdf, 900 KB)
- Aviso and PoDaac User Handbook - IGDR and GDR Jason-1 Products, SMM-MU-M5-OP-13184-CN, Edition 4.1, October 2008 (pdf, 2Mo)
- reading programmes in C, IDL, PV Wave, Fortran, Visual Basic and Java are available within the DVD Rom
- See Data reading software
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
GDR (delayed time)
Satellite | Distribution media | Frequency | Delivery delay | Data period | Data used | File weight |
|---|---|---|---|---|---|---|
Jason-2 | GDR DVD Rom (on request) | every 3 months | 60 days | Jun 2008 - ongoing | One pass per file | 5 MB per pass file |
every 10 days | ||||||
Jason-1 | GDR DVD Rom | every 3 months | 40 days | Jan 2002 - ongoing | One pass per file | 1.3 MB per pass file |
every 10 days | ||||||
Envisat | please contact EOHelp (ESA) | every 35 days | 2 months | Apr 2003 - ongoing | One pass per file | 1.3 MB per pass file |
T/P | CD Rom | every month | 40 days | Oct 1992 - Dec 2003 | One pass per file | 0.7 MB per pass file |
DVD Rom GDR | every 2 months | Dec 2003 - Oct 2005 |
See also GDR products available on the catalogue (through menu DATA SELECTION) and existing CD / DVD Roms list
IGDR (near-real time) : Interim Geophysical data record
Satellite | Distribution media | Frequency | Delivery delay | Data period | Data used | File weight |
|---|---|---|---|---|---|---|
Jason-2 | every day | 2 to 3 days | last month online | One pass per file | 2-3 MB per pass file | |
Jason-1 | every day | 2 to 3 days | last month online | One pass per file | 1.3 MB per pass file | |
Envisat | ftp, please contact EOHelp (ESA) | every day | 3 to 5 days | last 2 months online | One pass per file | 1.3 MB per pass file |
See also IGDR products available on the catalogue (through menu DATA SELECTION)