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Earth Topics (Applications)
  • Ocean and Coast
  • Ocean Colour/Biology and Fisheries

  • Atmosphere
  • Chemistry

    Clouds/Precipitation

    Radiation/Temperature

    Climate Change/Kyoto

    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
    SCIAMACHY Geo-located atmospheric spectra
    (SCI_NL__1P)
    ENVISAT
    (2384) recent views
    Last update: 21 November 2016

    This data product covers geo-located, radiometrically and spectrally calibrated limb and nadir radiance spectra for Nadir, Limb, and Occultation measurements with additional monitoring and calibration measurements. The Level 1b product is the lowest level of SCIAMACHY data delivered to the users.

    The instrument Instantaneous Field of View (IFoV) is approximately 0.045 deg (scan direction) x 1.8 deg (flight direction). This corresponds to a ground pixel size of 25 Km x 0.6 km at the sub-satellite point (nadir) and of 103 km x 2.6 km at the Earth's horizon (limb).

    Nadir measurements have a maximum swath width of 960 km (in scan direction) and a typical footprint of 30 km (along track) x 60 km (across track).

    Limb measurements have a tangent height range spanning from 0 to 100 km with 3 km vertical resolution. Azimuth scans are performed for constant elevation angle, typically 34 elevation steps per limb scan.

    Maximum azimuth range is +/- 44 deg relative to S/C velocity (Note that the azimuth range is adjusted to observe the same atmospheric volume as for nadir measurements within five minutes).

    The radiometric resolution is 16 bits, with a spectral resolution of 0.24 nm to 1.5 nm, depending on the spectral range. The Sun normalized radiometric accuracy is 2 to 3% in unpolarized light, and 3 to 4% in polarized light. The relative radiometric accuracy is less than 1% and the spectral accuracy spans form 0.005 nm to 0.035 nm.

    Individual measurements from dedicated monitoring states include:

    • Sun over diffuser
    • Subsolar calibration
    • Spectral lamp measurements
    • White light source measurements
    • Elevation mirror monitoring (Sun/Moon)
    • ADC calibration

    Level 1b products are corrected for degradation applying a scan mirror model and m-factors.

    The latest Level 1b dataset is version 8.0X. See related news of 06 May 2016.

    Data Set Specifications
    Spatial coverage: 90 N, 90 S, 180 W, 180 E
    Temporal coverage: 2002-08-02 - 2012-04-08
    Processing level
    Level 1b
    How to access this data

    Reprocessed Data V8: Full mission dataset is available via FTP upon registration (permanent).

    See SCIAMACHY products availability table (PDF, 174kb).

    Access to the Level 1b v7.04 products has been disrupted since November 2016. Users are recommended to use the latest reprocessed dataset (v8).

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

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    SCIAMACHY Product Handbook

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    Documentation related to SCIAMACHY data quality

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