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Envisat SCIAMACHY Geo-located atmospheric spectra [SCI_NL__1P]

How To Access Data

Fast Registration with Immediate Access (Open)

  1. Go to the ESA User Services Portal
  2. Register or log in to EO Sign In
  3. Submit the form for accessing the data
  4. You will receive an email with your user name
  5. A second email will follow with your password to download the data from the scia-ftp-ds.eo.esa.int server via an FTP client (see Read More for connection details) or, alternatively, from command line using L-FTP.
Read More

The data can be downloaded via an FTP client (e.g., FileZilla or WinSCP) using the options "explicit FTP over TLS if available" or "Require explicit FTP over TLS".

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

For further information about the EO Sign In Service you can visit TellUs.

Should you need support to access the data, please contact EOHelp.

Description

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.

Details

DATA SET SPECIFICATIONS

Spatial coverage:
90 N, -90 S, -180 W, 180 E
Temporal coverage:
2002-08-02 - 2012-04-08
Date of launch:
2002-03-01
Operators:
ESA
Mission status:
Completed
Orbit height:
800 km
Orbit type:
Sun-synchronous
Swath width:
5 - 1150 km

PROCESSING LEVEL

Level 1b

APPLICABLE TERMS & CONDITIONS

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

READ T&C

RESOURCES

Auxiliary Data

SCIAMACHY Auxiliary Data

Auxiliary Data

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Product Information

Envisat SCIAMACHY Sensor Performance, Products and Algorithms

Product Information

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User Manual

SCIAMACHY Product Handbook

User Manual

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Product Specifications

More SCIAMACHY Documents

Product Specifications

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Tools

SCIAMACHY Software Tools

Tools

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