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Along-track Sea Level Anomalies Level-2+ (L2P)

Note that these products replace the products formerly named "along-track Corrected Sea Surface Heights" (CORSSH)

Types of dataset: Monomission altimeter product, available for several missions. 

Contents: along-track corrected sea level anomalies with corrections wrt reference ellipsoid. Datasets of 1Hz spatial resolution for all missions + datasets of 20Hz spatial resolution for Copernicus Sentinel-3A&B, Jason-3 in Short Time Critical (STC) and Near-Real-Time (NRT)

Use: stationary or long-term geophysical and ocean phenomenon studies.

Description: Mono altimeter satellite product, with corrections and geophysical parameters. Note that monomission products by definition are not intercalibrated at crossover points. Thus Jason-1 and Envisat data for example may not be homogeneous at a given point, since their orbits are different. Note also that these products are not corrected from Large Wavelength Error (LWE), unlike multimission Ssalto/Duacs products.
Check monomossion processing last updates

Geographic coverage: Global, the maximum coverage in latitude depends on the mission.

Format: NetCDF-CF

Tools and reference:

The use of Copernicus Sentinel-3 and Sentinel-6 Michael Freilich products is described in the licence agreement (section 13. Licence specific to Sentinel-3 L2P products).

Citations:

  • for Copernicus Sentinel-3 & Sentinel-6 Michael Freilich missions, please refer to the licence agreement to mention credits explicitly in function of your use (section 13. Licence specific to Sentinel-3 L2P products).
  • for the other missions, please cite: "The altimeter products were produced and distributed by Aviso+ (https://www.aviso.altimetry.fr/), as part of the Ssalto ground processing segment"

Copyright :

  • for Copernicus Sentinel-3 & Sentinel-6 Michael Freilich missions: 2016-ongoing CNES/CLS consortium under an EUMETSAT Contract, funded by the European Union. Further information in the licence agreement
  • for the other missions : 1992- ongoing Cnes-CLS

Near-Real-Time (NRT) L2P SLA

Satellite Distribution media Quality reports Delivery delay Data period Data used File weight
Sentinel-3A 1Hz FTP FTP 4 hours 2 months one pass per file <100 Ko per file (zipped)
Sentinel-3A 20Hz FTP twice a day 2 months <3.5 Mo per file 
Sentinel-3B 1Hz FTP 4 hours 2 months <100 Ko per file (zipped)
Sentinel-3B 20Hz FTP twice a day 2 months <3.5 Mo per file
Jason-3 20Hz FTP twice a day 2 months 4 Mo per file
Sentinel-6A MF 1Hz HR FTP 4 hours 2 months <130 Ko per file (zipped)

Short Time Critical (STC) L2P SLA

Satellite Distribution media Quality reports Delivery delay Data period Data used File weight
Sentinel-3A 1Hz FTP FTP 56 hours 2 months one pass per file <100 Ko per file (zipped)
Sentinel-3A 20Hz FTP twice a day 2 months <3.5 Mo per file
Sentinel-3B 1Hz FTP 56 hours 2 months <100 Ko per file (zipped)
Sentinel-3B 20Hz FTP twice a day 2 months <3.5 Mo per file
Jason-3 20 Hz FTP every day 2 months 4 Mo per file
Sentinel-6A MF 1Hz HR FTP 36 hours 2 months <130 Ko per file (zipped)

Non Time Critical (NTC) L2P SLA

Satellite Distribution media Quality reports Delivery delay Data period Data used File weight
Sentinel-3A 1Hz FTP FTP 1.5 month jun 2016 - ongoing one pass per file <100 Ko per file (zipped)
Sentinel-3B 1Hz FTP FTP 1.5 month nov 2018 - ongoing <100 Ko per file (zipped)
Jason-3 1Hz FTP - 3 months feb 2016 - ongoing <100 Ko per file (zipped)
Jason-2 1Hz FTP - - jul 2008 - sep 2017 <100 Ko per file (zipped)
Jason-1 1Hz FTP - - jan 2002 - jun 2013 <100 Ko per file (zipped)
Saral 1Hz FTP - 3 months mar 2013 - ongoing <100 Ko per file (zipped)
Cryosat-2 1Hz FTP - 3 months jan 2011 - ongoing <100 Ko per file (zipped)
HY-2A 1Hz FTP - 3 months apr 2014 - ongoing <100 Ko per file (zipped)
Envisat 1Hz FTP - - may 2002 - apr 2012 <100 Ko per file (zipped)
ERS-1 1Hz FTP - - oct 1992 - jun 1996 <100 Ko per file (zipped)
ERS-2 1Hz FTP - - may 1995 - sep2003 <100 Ko per file (zipped)
T/P 1Hz FTP - - sep 1992 - sep 2005 <100 Ko per file (zipped)
GFO 1Hz FTP - - jan 2000 - sep 2008 <100 Ko per file (zipped)
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