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Proceedings Paper

Validation of MIPAS/ENVISAT Level-1B data products
Author(s): Gizaw Mengistu Tsidu; Michael Kiefer; Thomas von Clarmann; Herbert Fischer; Bernd Funke; Udo Grabowski; Frank Hase; Michael Hoepfner; Manuel Lopez-Puertas; Gabriele P. Stiller
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Paper Abstract

Spectral limb radiances measured by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) onboard the Envisat Environmental research satellite are characterized in terms of instrument line shape (ILS), noise equivalent spectral radiance (NESR) and possible impact of non-local thermodynamic equilibrium emission in deep space calibration spectra. Furthermore, it is assessed if the operational processing baseline to set the top of the model atmosphere to 120~km is justified. The major findings are: The ILS parametrization provided along with the measurement data is sub-optimal; spectral residuals can be reduced by application of an ILS correction function. Spectral noise as estimated in this study is systematically lower than the values provided along with the measurement data. There is no evidence for significant noise correlations in the spectral domain. There is no indication of non-local thermodynaic equilibrium induced upper atmospheric signal in the so-called 'deep-space' spectra which are used for the radiometric zero-level calibration.

Paper Details

Date Published: 9 April 2003
PDF: 14 pages
Proc. SPIE 4891, Optical Remote Sensing of the Atmosphere and Clouds III, (9 April 2003); doi: 10.1117/12.467524
Show Author Affiliations
Gizaw Mengistu Tsidu, Forschungszentrum Karlsruhe and Univ. Karlsruhe, IMK (Germany)
Michael Kiefer, Forschungszentrum Karlsruhe and Univ. Karlsruhe, IMK (Germany)
Thomas von Clarmann, Forschungszentrum Karlsruhe and Univ. Karlsruhe, IMK (Germany)
Herbert Fischer, Forschungszentrum Karlsruhe and Univ. Karlsruhe, IMK (Germany)
Bernd Funke, Instituto de Astrofisica Andalucia CSIC (Spain)
Udo Grabowski, Forschungszentrum Karlsruhe and Univ. Karlsruhe, IMK (Germany)
Frank Hase, Forschungszentrum Karlsruhe and Univ. Karlsruhe, IMK (Germany)
Michael Hoepfner, Forschungszentrum Karlsruhe and Univ. Karlsruhe, IMK (Germany)
Manuel Lopez-Puertas, Instituto de Astrofisica Andalucia CSIC (Spain)
Gabriele P. Stiller, Forschungszentrum Karlsruhe and Univ. Karlsruhe, IMK (Germany)


Published in SPIE Proceedings Vol. 4891:
Optical Remote Sensing of the Atmosphere and Clouds III
Hung-Lung Huang; Daren Lu; Yasuhiro Sasano, Editor(s)

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