Minimize Dataset Details
Earth Topics (Applications)
Instrument type
  • WS
  • Mission
    Date of Launch:
    ERS-1 - 17 July 1991
    ERS-2 - 21 April 1995
    Mission Status:
    ERS-1 ended on March 2000 and ERS-2 September 2011 
    Orbit Height:
    782 to 785 km
    Orbit type:
    Near-circular, polar, Sun-synchronous
    Swath Width:
    5 km
    SCATTEROMETER Ocean Wind field and Sea Ice probability High and Nominal Resolution
    (ERS.ASPS20.H and ERS.ASPS20.N)
    (2786) recent views
    Last update: 12 June 2019

    The ASPS Level 2 products contain, for each node: the radar backscattering sigma nought for the three beams of the instrument, the four aliased wind solutions (Rank 1-4 wind vector) and the de-aliased wind vector flag, the sea-ice probability and sea-ice flag, the YAW quality flag.

    The wind retrieval is performed with the CMOD5N geophysical model function derived by ECMWF to compute the neutral winds rather than 10m winds.

    ASPS L2.0 High resolution products are provided with a spatial resolution of 25x25 km and a grid spacing of 12.5 km.

    ASPS L2.0 Nominal resolution products are provided with a spatial resolution of 50x50 km and a grid spacing of 25 km.

    One product covers one orbit from ascending node crossing.

    Please consult the Product Quality Readme file before using the ERS ASPS data.

    Data Set Specifications
    Spatial coverage: 82 N, 82 S, 180 W, 180 E
    Temporal coverage: 1991-08-01 - 2011-07-04
    Current Processor Version: ASPS 10.04
    Processing level
    Level 2
    How to access this data

    The data is distributed in ASPS and NetCDF format via FTP upon registration.

    Reprocessed Data:

    ERS-1 data is available from 01 August 1991 to 02 June 1996.

    ERS-2 data is available from 26 March 1996 to 04 July 2011. 

    See WS products table and related news of 13 June 2019.

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


    Documentation related to ERS Scatterometer data


    Scatterometer Quality Information


    All Scatterometer documents