Mobile version

X-TRACK: Sea Level Anomalies dedicated to coastal applications


Types of dataset: Altimeter Sea Level Anomalies dedicated to coastal applications at 1Hz
Contents: Along-track Sea Level Anomalies projected onto the reference tracks with a spatial interval of about 6-7 km between points (1 second). Specific processing (developed at LEGOS) has been made using the latest corrections available.
Use: coastal applications
Description: multimission altimeter satellite product in delayed time
Format: NetCDF

  • User handbook: X-TRACK product user manual
  • References: Birol, F., N. Fuller, F. Lyard, M. Cancet, F. Niño, C. Delebecque, S. Fleury, F. Toublanc, A. Melet, M. Saraceno, F. Léger, 2017. “Coastal Applications from Nadir Altimetry: Example of the X-TRACK Regional Products.” Advances in Space Research, 2017, 59 (4), p.936-953. doi:10.1016/j.asr.2016.11.005.

Geographic coverage:the zones have been defined as indicated below:

For details on the defined areas, please click on the map.

Copyright : 1993- ongoing. These products were developed, validated and distributed by CTOH/LEGOS France. Publications should include the following statement in the Acknowledgments: “Altimetry data used in this study were developed, validated by the CTOH/LEGOS, France and distributed by Aviso+”.

X-TRACK products are now identified by a DOI. Please use it when citing X-TRACK.
For the last version the DOI is 10.6096/CTOH_X-TRACK_2017_02.

Complementary informations can be find here (Product details, temporal coverage, processing methods,..).


SatelliteTypeAuthenticated access services
Data periodFile weight
Topex/Jason-1/Jason-2/Jason-3along-trackFTP (please information in the 'product page' of your private space)
CTOH website
Feb. 1993 - ongoing
Jason-1 Interleaved orbit (J1N)
Topex Interleaved orbit (TPN)/Jason-1 Interleaved orbit (J1N)
Topex Interleaved orbit (TPN)
Geosat Follow On
Rss feedsContactSitemapPartnersFAQGlossaryLexiconMobile
You must enable cookies in your browser preferences to save the modifications
You are using an older version of Internet Explorer, please update to take full advantage of Aviso+ features

Customize the home page

View all widgets
Reduce display
Public profile
User profile

Select/Deselect widgets

Discover AVISO+

Customizable home, reading tools, products search guide, etc.. Discover step by step the features of the new site AVISO+.

Customizable homepage

The new home page is composed of blocks called "widgets".

Rearrange the blocks with a "Click & Drop".

Hide a widget with the cross at the top right. Reset or add a widget with the "wrench" icon. The "User" and "Public" profiles offer a predefined organization.

All the modifications are automatically saved as cookies on your machine so as to enable you to have your own specific AVISO+.

Reading tools

Ease your reading by choosing the page background colour (black/white) and/or by modifying the font size.

Browsing menu and breadcrum trail

To ease your browsing through AVISO+, you can use at any time the main banner items with the interactive submenus or use the browsing menu on the left side of the screen (it is open by default). For more readiness of the page contents, you can fold and unfold the browsing menu by clicking on the tab. At any time you can know where you are thanks to the browsing menu or the breadcrum at the top of the page.

Products search guide

The first submenu of the "Data" banner item leads you to a new search form enabling you to find quickier the product that suits your needs. The list of results is updated according to your selection criteria.

AVISO+ Multimedia

The first submenu of the "Multimedia" banner item leads you to AVISO+ collections of images and videos linked to altimetry and its applications. Have a nice visit!