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Earth Topics (Applications)
  • Land
  • Topography/Mapping

  • Ocean and Coast
  • Ocean Colour/Biology

  • Atmosphere
  • Clouds/Precipitation

    Winds

    Instrument type
    Instrument
    Mission
    Operators:
    ESA
    Date of Launch:
    1 March 2002
    Mission Status:
    Out of service since May 2012 
    Orbit Height:
    800 km 
    Orbit type:
    Sun-synchronous 
    Swath Width:
    5 - 1150 km
    MERIS Full Resolution Full Swath
    (ENVISAT.MER.FRS_1P)
    ENVISAT
    (3559) recent views
    Last update: 22 June 2017

    The MERIS Level 1b product is given in radiance units [W sr-1 m-2 micrometers-1] after scaling.

    The in-band reference irradiances for the 15 MERIS bands are computed by averaging the in-band solar irradiance of each pixel. The in-band solar irradiance of each pixel is computed by integrating the reference solar spectrum with the band-pass of each pixel. The 15 sun spectral flux values provided in the "GADS Scaling" record of the Level 1b products are the in-band reference irradiances adjusted for the Earth-sun distance at the time of measurement.

    The band-pass of each pixel is derived from on-ground and in-flight characterisation via an instrument model. The values "Band wavelength" and "Bandwidth" provided in the SPH of the Level 1b products are the averaged band-pass of each pixel over the instrument field of view.

    Auxiliary data include: Orbit state vector, Time correlation parameters, Latitude, Longitude, altitude and topographic corrections, Sun azimuth, Sun elevation, view azimuth, view elevation, dataMean Sea Level pressure, Total column ozone, Total column water vapour, Wind speed.

    The Level 1b FRS product covers the complete instrument swath. The product duration is not fixed and it can span up to the time interval of the input Level 0. Thus the estimated size of the Level 1B FRS is dependent on the start/stop time of the acquired segment.

    Data Set Specifications
    Spatial coverage: 90 N, 90 S, 180 W, 180 E
    Temporal coverage: 2002-05-17 - 2012-04-08
    Processing level
    Level 1b
    How to access this data

    The MERIS Level 1 FRS data covering the entire archive from May 2002 to April 2012 has been systematically processed and made available online via FTP and HTTP upon Fast Registration since Q4/2013.

    See related news on the MERIS FRS L1 bulk processing of 20 December 2013


    Yearly and global density maps are available to get a better overview of the MERIS FRS coverage.


    The MERIS FR/FRS Level 1 on-demand production service has been phased out after the release of the full FRS L1 mission dataset online.

    Terms & Conditions applicable
    Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions
    Auxiliary data
    MERIS auxiliary data
    Available via SPPA
    Resources

    HTML

    MERIS Product Handbook

    PDF

    More MERIS Documents

    PDF

    MERIS Products Specifications