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January 2020: upgrade of the regional X-TRACK Along-track Sea Level Anomalies

The regional XTRACK Along-track Sea Level Anomalies product has been updated: the long time series TP+J1+J2+J3 takes into account

  • the temporal extension until 2019/05/22 (cycle 120 of J3) and
  • the new MDT CNES_CLS18  over the whole period (since TP) 

The DOI associated to this product is unchanged: 10.6096/CTOH_X-TRACK_2017_02.


The data are available via your personal AVISO+
If you are not registered, please fill the form and select the product "Coastal X-TRACK SLA (restricted licence)" in the category "Coastal, ice and hydrology products".

January 2020: Release of the regional XTRACK Tidal Constants product

The XTRACK Tidal Constant is a new added-value coastal altimetry product. It provides accurate along-track tidal constant estimates at regional scale and includes all coastal seas in the world. This product usefully completes tide gauge observations for tidal studies, the validation of tidal models or data assimilation into models.

Computed by the Centre of Topography of the Oceans and the Hydrosphere (CTOH), the regional XTRACK Tidal Constant product is estimated from the regional XTRACK Sea Level Anomalies for 73 tidal constituents by using harmonic analysis and for long time series missions ( Topex / Poseidon + Jason -1+ Jason -2 and Topex / Poseidon interleaved + Jason -1 interleaved).

The DOI is 10.6096/CTOH_X-TRACK_Tidal_2018_01


The details about processing can be found in the product page and in the handbook.


You will access to this product called
“Regional X-TRACK Tidal Constants Along-track” in the category “Auxiliary products”
on your personal space on AVISO+.
If you are not registered, please fill the form and select this product.

April 2018: new version X-TRACK_2017_02 available on the ftp server

The X-TRACK coastal along-track SLA products are now available via the authenticated ftp.

For the moment, the version X-TRACK_2017_02 is available. The files are delivered in subfolders dedicated to each zone (all the details in the handbook). This information is also accessible in the 'product page' of your private space.

This new version is identified with DOI 10.6096/CTOH_X-TRACK_2017_02

  • Is only available on the FTP server (On the Online Data Extraction Service (ODES), only the former version X-TRACK_2015 is available)
  • Includes more altimetric missions and time series (TP+J1+J2+J3, TP, J1, J1N, J2, TPN+J1N, TPN, J1N, Saral /AltiKa, ENVISAT, GFO )
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