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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


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 (DOI 10.6096/CTOH_X-TRACK_2017_02) 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.

The X-TRACK processing chain version 1.03 (2019/05) has now identifier undefinedIDDN.FR.010.0121178.000.R.P.2019.041.31235

Complementary informations can be find here (Product details, temporal coverage, processing methods,..).
Refer to the information about upgrades and reprocessing 


SatelliteTypeAuthenticated access services
Data period
Topex/Jason-1/Jason-2/Jason-3along-trackFTP (more information in the 'product page' of your private space)Feb. 1993 - ongoing
Topex Interleaved orbit (TPN)/Jason-1 Interleaved orbit (J1N)Sep. 2002- Feb 2012
SARAL/AltiKaMar. 2013 - Apr. 2016
EnvisatOct. 2002- Sep. 2010
Geosat Follow OnJan. 2000- Sep 2008
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