Minimize Dataset Details
Earth Topics (Applications)
  • Land
  • Vegetation


  • Snow and Ice
  • Sea Ice

    Instrument type
  • SAR
  • 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
    ERS-1/2 - SAR Level 1 Precision Image Product
    (9080) recent views
    Last update: 10 April 2017

    The SAR Precision product is a multi-look (speckle-reduced), ground range image acquired in Image Mode. This product type is most applicable to users interested in remote sensing applications, but is also suitable for calibration purposes. The products are calibrated and corrected for the SAR antenna pattern and range-spreading loss. Radar backscatter can be derived from the products for geophysical modelling, but no correction is applied for terrain-induced radiometric effects. The images are not geocoded, and terrain distortion (foreshortening and layover) has not been removed.

    The numbering sequence relates to the satellite position and therefore differs between Ascending and Descending scenes. 


    Product characteristics
    Pixel size 12.5 m (range - across track) x 12.5 m (azimuth - along track)
    Scene area 100 km (range) x at least 102.5 km (azimuth)
    Scene size 8000 pixels range x at least 8200 lines (azimuth)
    Pixel depth 16 bits unsigned integer
    Total product volume ~ 125 MB
    Projection Ground-range
    Number of looks 3
    Data Set Specifications
    Spatial coverage: 82 N, 82 S, 180 W, 180 E
    Temporal coverage: 27-07-1991 - 04-07-2011
    Current Processor Version: PF-ERS / Envisat format
    Processing level
    Level 1
    How to access this data

    Data is available online after registration for the (A)SAR On The Fly Service.

    For more details see the news article from 11 April 2017

    Dataset available on EO CAT

    Terms & Conditions applicable
    Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions
    Auxiliary data
    ERS-1 auxiliary data
    Available via SPPA
    ERS-2 auxiliary data
    Available via SPPA


    Envisat Format Product Specification


    ERS-1 SAR Sensor Performance, Products and Algorithms


    ERS-2 SAR Sensor Performance, Products and Algorithms


    Basic Envisat SAR Toolbox (BEST)


    Next ESA SAR Toolbox (NEST)


    Sentinel-1 Toolbox / Sentinel Application Platform (SNAP)


    Derivation of Backscattering Coefficient Sigma 0 in ESA ERS SAR PRI Products


    Review of the impact of the ERS-2 Piloting Modes on the SAR Doppler Stability


    More SAR Documents