Products
ADT - Absolute Dynamic Topography
Types of dataset: Ssalto/Duacs multimission altimeter products
Contents: along-track sea surface heights above geoid; dynamic topography is the sum of sea level anomaly (SLA) and mean dynamic topography (MDT)
Use: study of the general circulation (ocean gyres ...)
Condition of access : All Ssalto/Duacs product users need an account on FTP, see Access to Ssalto/Duacs data
Description: mono altimeter satellite product homogeneous with other satellites, available in near-real time and in delayed time.
Geographic coverage: global
A specific regional product with an improved quality is available in local areas (more information).
Formats: NetCDF, NetCDF CF1.4
Tools:
DT-ADT
Description: this delayed time product is available in two versions:
- "Ref" (Reference) series: homogeneous datasets based on two satellites (Jason-2 / Envisat or Jason-1 / Envisat or Topex/Poseidon / ERS) with the same groundtrack. Sampling is stable in time.
- "Upd" (Updated) series: up-to-date datasets with up to four satellites at a given time (Jason-2 / Jason-1 / Envisat from 2009 or between October 2002 and September 2005, the association Jason-1 / Topex/Poseidon / Envisat / GFO). Sampling and Long Wavelength Errors determination are improved, but quality of the series is not homogeneous.
Copyright : 2005-ongoing CLS - Cnes
DT-ADT "Ref"
Satellite |
Authenticated access service |
Frequency |
Data period |
File weight |
Jason-2 |
FTP |
6 months |
From Oct-08 to Jul-12 |
4 MB per file (zipped) |
Jason-1 |
6 months |
From Apr-02 to Oct-08 |
4 MB per file (zipped) |
Envisat |
6 months |
From Oct-02 to Apr-12 |
3 MB per file (zipped) |
ERS-1 |
6 months |
From Oct-92 to May-95 |
3 MB per file (zipped) |
ERS-2 |
6 months |
From May-95 to Apr-03 |
3 MB per file (zipped) |
T/P |
6 months |
From Sep-92 to Apr-02 |
3 MB per file (zipped) |
