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Earth Topics (Applications)
  • Ocean and Coast
  • Ocean Currents and Topography

    Ocean Waves

    Instrument type
  • RA2
  • Mission
    Date of Launch:
    1 March 2002
    Mission Status:
    Out of service since May 2012 
    Orbit Height:
    800 km 
    Orbit type:
    Swath Width:
    5 - 1150 km
    RA-2 Sensor and Geophysical Data Record - SGDR
    (2834) recent views
    Last update: 05 July 2018

    This is a RA-2 Sensor and Geophysical Data Record (SGDR) Full Mission Reprocessing (FMR) v3 product. This FMR follows the first Envisat Altimetry reprocessing Version (V2.1) completed in 2012.
    The GDR and S-GDR data products were reprocessed for all cycles from 6 to 113 (May 2002 to April 2012) into a homogeneous standard in NetCDF format (close to Sentinel-3).

    The Sensor Data Record (SGDR) Product from RA-2/MWR includes the data in the GDR product  (RA-2 geophysical data, MWR data) and also RA-2 averaged waveforms (18Hz) and RA-2 individual waveforms (1800Hz). This product is a continuation of ERS RA data.

    This data product has a coverage of 1 pass, pole-pole, a spatial sampling of about 390 m along track and a size of 31 to 40 Mbytes, depending on presence of individual waveforms.

    The radiometric accuracy is 0.2 dB and auxiliary data include: Orbit state vectors (DORIS, FOS), RA2 and MWR characterisation data, Platform attitude, Gain calibration, USO frequency, ECMWF data, time relation, leap second, Ionospheric corrections, geoid, mean sea surface, slope data, and tide model (ocean, earth, loading, pole).

    Please consult the Envisat RA-2/MWR Product Quality Readme file before using the data.

    Data Set Specifications
    Spatial coverage: 90 N, 90 S, 180 W, 180 E
    Temporal coverage: 2002-05-14 - 2012-04-08
    Processing level
    Level 2
    How to access this data

    Data from 14 May 2002 to 8 April 2012 is available online via FTP upon Registration

    Details on the V3.0 datasets can be found in the Envisat RA-2/MWR Products Availability Table.

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    Terms & Conditions applicable
    Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions




    RA2 Product Handbook


    Product Specifications


    ReadMe file


    Further information related to RA2 Products and Quality


    Envisat Altimetry Error Budget