CMEMS - Sealevel GLO PHY L4 REP observations 008 047

This dataset is a satellite global sea level product downloaded from the Copernicus Marine Environment Monitoring Service (CMEMS). For more information and the official documentation, including the product manual refer to the CMEMS data portal. The following brief description is copied over from the original website. For the Global Ocean - Multimission altimeter satellite gridded sea surface heights and derived variables computed with respect to a twenty-year mean. Previously distributed by Aviso+, no change in the scientific content. All the missions are homogenized with respect to a reference mission which is currently OSTM/Jason-2. The sla is computed with an optimal and centered computation time window (6 weeks before and after the date). Two kinds of datasets are proposed: filtered (nominal dataset) and unfiltered.

Resolution is 0.25X0.25 degrees and has an irregular temporal resolution. The data starts in 1993 and it's ongoing.

Terms of use

NB You need to register with CMEMS to use this product:

Registration form: .

The full terms are listed on the CMEMS website:

In particular: ... In case of any publication, the Licensee will ensure credit the Copernicus Marine Service in the following manner:“This study has been conducted using E.U. Copernicus Marine Service Information” ...


This dataset is available in the ua8 project:


v2019 is the most recent version

Filenames are:



  • sea_surface_height_above_sea_level (SSH)
  • surface_geostrophic_eastward_sea_water_velocity_assuming_sea_level_for_geoid (UVG)
  • surface_geostrophic_northward_sea_water_velocity_assuming_sea_level_for_geoid (UVG)
  • sea_surface_height_above_geoid (SSH)
  • surface_geostrophic_eastward_sea_water_velocity (UVG)
  • surface_geostrophic_northward_sea_water_velocity (UVG)


The "timeseries" folder contains a concatenated version of the dataset latest version (v2019). Each year is concatenated in one file and chunksizes have been changed to make accessing the data as a timeseries faster. We try to update the current year regularly but still there might be more days available in the actual datset folder (v2019).



2021-10-20 There hasn't been updates to this dataset for a while, the latest available data is 2020-06-03. We check for updates regularly, so we when updates will resume we will be downloading the new data automatically.

2020-07-17 We updated to the most recent version v2019. As CMEMS doesn't always distinguish between a new version and an extension the year 2018/2019 were previously incorrectly downloaded as part of v4-0 while they are available now in v2019.

For more information check the CMEMS release notes