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ESA Sea State Climate Change Initiative (Sea_State_cci): Global remote sensing multi-mission along-track significant wave height (SWH) from SAR WV onboard Sentinel-1A & 1B, L2P product, release version 3.

Update Frequency: Not Planned
Latest Data Update: 2022-10-07
Status: Completed
Online Status: ONLINE
Publication State: Citable
Publication Date: 2022-10-12
DOI Publication Date: 2022-10-13
Download Stats: last 12 months
Dataset Size: 127.45K Files | 9GB


The ESA Sea State Climate Change Initiative (CCI) project has produced global multi-sensor time-series of along-track satellite synthetic aperture radar (SAR) significant wave height (SWH) data (referred to as SAR WV onboard Sentinel-1 Level 2P (L2P) SWH data) with a particular focus for use in climate studies.

This dataset contains the Sentinel-1 SAR Remote Sensing Significant Wave Height product (version 1.0), which is part of the ESA Sea State CCI Version 3.0 release. This product provides along-track SWH measurements at 20km resolution every 100km, processed using the Quach et al statistical model , separated per satellite and pass, including all measurements with flags, corrections and extra parameters from other sources. These are expert products with rich content and no data loss. The SAR Wave Mode data used in the Sea State CCI dataset v3 come from Sentinel-1 satellite missions spanning from 2015 to 2021 (Sentinel-1 A, Sentinel-1 B)

Citable as:  Grouazel, A.; Stopa, J.; Piollé, J.-F.; Mouche, A.; Sadowski, P. (2022): ESA Sea State Climate Change Initiative (Sea_State_cci): Global remote sensing multi-mission along-track significant wave height (SWH) from SAR WV onboard Sentinel-1A & 1B, L2P product, release version 3.. NERC EDS Centre for Environmental Data Analysis, 13 October 2022. doi:10.5285/81bab8b378db443db4482a5961a58ec1.
Abbreviation: Not defined
Keywords: CCI, Sea State, Significant Wave Height, SAR


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data was produced by the ESA Sea State CCI team at Ifremer and was transferred to CEDA as part of the ESA CCI Open Data Portal project.

Data Quality:
The data were quality checked and compared to in situ reference data. For more details on the validation process, refer to the product user guide.
File Format:
Data are in NetCDF format

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Computation Element: 1

Title Computation for the ESA Sea State Climate Change Initiative (Sea_State_cci) v3 products
Abstract For information on the derivation of the ESA Sea_State_cci v3 products please see the product user guide.
Input Description None
Output Description None
Software Reference None
Output Description


  • units: m s-1
  • long_name: 10 metre U wind component
  • var_id: wind_speed_model_u
  • standard_name: wind_speed_model_u
  • units: m s-1
  • long_name: 10 metre V wind component
  • var_id: wind_speed_model_v
  • standard_name: wind_speed_model_v
  • units: K
  • long_name: 2 metre temperature
  • var_id: surface_air_temperature
  • standard_name: surface_air_temperature
  • units: m
  • var_id: swh
  • standard_name: sea_surface_wave_significant_height
  • long_name: C band significant wave height
  • units: Pa
  • standard_name: surface_air_pressure
  • var_id: surface_air_pressure
  • long_name: Mean sea level pressure
  • var_id: normalized_variance
  • standard_name: normalized_variance
  • long_name: Normalized variance of digital numbers (complex I+Q values)
  • long_name: consolidated instrument and ice flags
  • var_id: swh_rejection_flags
  • standard_name: swh_rejection_flags
  • units: m
  • var_id: distance_to_coast
  • long_name: distance to nearest coast for WV image center
  • units: degree
  • var_id: angle_of_incidence
  • standard_name: angle_of_incidence
  • long_name: incidence angle of the WV acquisition
  • units: m
  • var_id: bathymetry
  • long_name: ocean depth
  • standard_name: sea_floor_depth_below_mean_sea_level
  • var_id: swh_quality
  • standard_name: swh_quality
  • long_name: quality of C band significant wave height measurement
  • units: degree
  • var_id: heading
  • standard_name: satellite_heading
  • long_name: satellite heading relative to geographic North in clockwise convention
  • units: 1
  • var_id: sea_ice_fraction
  • standard_name: sea ice fraction
  • units: dB
  • var_id: sigma0
  • standard_name: sigma0
  • long_name: sigma0 (Normalized Radar Cross Section)
  • units: m
  • var_id: swh_model
  • standard_name: sea_surface_wave_significant_height_ERA5
  • long_name: significant wave height from ERA5 0.50deg resolution
  • units: m
  • var_id: swh_uncertainty
  • standard_name: swh_uncertainty
  • long_name: standard deviation associated to hs : level of confidence of the NN model
  • units: m s-1
  • standard_name: wind_speed
  • var_id: wind_speed
  • long_name: wind speed coming from ESA OCN WV product (CMOD-based wind inversion without Bayesian scheme)

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • long_name: latitude
  • var_id: lat
  • units: degrees_east
  • standard_name: longitude
  • long_name: longitude
  • var_id: lon
  • standard_name: time
  • var_id: time
  • units: seconds
  • long_name: measurement time
Temporal Range
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Geographic Extent