6. Data access

6.1. Basic download

The data can be obtained from Ifremer through HTTP or FTP.

• for FTP, go to: ftp://ftp.ifremer.fr/ifremer/cersat/data/ocean-waves/cci-seastate/v4/

• for HTTP, go to: https://data-cersat.ifremer.fr/data/ocean-waves/cci-seastate/v4/

No login or password is required.

The data will be later pushed to the legacy ESA CCI archive at: https://climate.esa.int/en/projects/sea-state/data/ .

The common directory structure is based on CCI recommendations and is arranged as follows:

/cci_seastate/<release version>/data/<instrument type>/<type>/<mission>/<date>/

Where:

• <cci_project> : seastate

• <release version> is the dataset version (currently 4.0 for this dataset)

• <instrument type> is the type of remote sensing technique: altimeter or sar

• <type> : will be different for each ECV, but needs to be defined, and
  consistent within an ECV, here l2 for along-track data, l3 for edited merged products and l4 for monthly averaged gridded products)

• <mission> : satellite mission (for L2P products only)

• <date> : /

6.2. Data subsetting

Remote data subsetting and reading is also possible:

• with THREDDS/OPenDAP service: https://tds0.ifremer.fr/thredds/catalogs/ESACCI-SEASTATE-L4-SWH-MULTI_1M.html (L4 only) - check this tutorial

• with the ESA CCI Sea State API: https://cci-seastate.ifremer.fr/ (all products) - check this tutorial