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

    Topography/Mapping

    Vegetation

  • Snow and Ice
  • Sea Ice

    Snow and Ice

  • Natural Disasters
  • Oil Slick

  • Ocean and Coast
  • Ocean Currents and Topography

    Ocean Waves

    Coastal Geomorphology

  • Solid Earth
  • Tectonics/Seismic Activity

  • Water
  • Water Management

    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
    EOLI-SA availability
    ASAR Image Mode Precision Image
    (ENVISAT.ASA.IMP_1P)
    ENVISAT
    (1125) recent views
    Last update: 2 August 2016

    This is a multi-look, ground range, digital image generated from Level 0 data collected when the instrument is in Image Mode (7 possible swaths HH or VV polarisation). The product includes slant range to ground range correction. It is for users wishing to perform applications-oriented analysis and applies to multi-temporal imaging and to derive backscattering coefficients.

    The stand-alone image is generated using the Range/Doppler algorithm. The processing uses up to date (at time of processing) auxiliary parameters corrected for antenna elevation gain, and range spreading loss. Engineering corrections and relative calibration are applied to compensate for well-understood sources of system variability. Absolute calibration parameters, when available (depending on external calibration activities) are provided in the product annotations.

    This product provides a continuation of the ERS-SAR_PRI product.

    Spatial Resolution: 30 m ground range x 30 m azimuth

    Data Set Specifications
    Spatial coverage: 90 N, 90 S, 180 W, 180 E
    Temporal coverage: 2002-10-18 - 2012-04-08
    Processing level
    Level 1b
    How to access this data

    Data is available via EOLI-SA upon registration for the (A)SAR On The Fly Service.

    For information on access and use of the On-The-Fly service please refer to the OTF FAQ page and news of 28 July 2016.

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

    PDF

    ASAR Products Specification - Revision C

    HTML

    Range Doppler Algorithm

    HTML

    ASA_IMP_1P File Structure

    PDF

    Envisat ASAR Science and Applications

    HTML

    ASAR Level 1 Algorithms

    HTML

    ASAR Product Handbook

    PDF

    More ASAR Documents