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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 8 — Mar. 10, 2000
  • pp: 1323–1340

Optimized forward model and retrieval scheme for MIPAS near-real-time data processing

Marco Ridolfi, Bruno Carli, Massimo Carlotti, Thomas von Clarmann, Bianca M. Dinelli, Anu Dudhia, Jean-Marie Flaud, Michael Höpfner, Paul E. Morris, Piera Raspollini, Gabriele Stiller, and Robert J. Wells  »View Author Affiliations


Applied Optics, Vol. 39, Issue 8, pp. 1323-1340 (2000)
http://dx.doi.org/10.1364/AO.39.001323


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Abstract

An optimized code to perform the near-real-time retrieval of profiles of pressure, temperature, and volume mixing ratio (VMR) of five key species (O3, H2O, HNO3, CH4, and N2O) from infrared limb spectra recorded by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) experiment on board the European Space Agency (ESA) Environmental Satellite ENVISAT-1 was developed as part of a ESA-supported study. The implementation uses the global fit approach on selected narrow spectral intervals (microwindows) to retrieve each profile in sequence. The trade-off between run time and accuracy of the retrieval was optimized from both the physical and the mathematical points of view, with optimizations in the program structure, in the radiative transfer model, and in the computation of the retrieval Jacobian. The attained performances of the retrieval code are noise error on temperature <2 K at all the altitudes covered by the typical MIPAS scan (8–53 km with 3-km resolution), noise error on tangent pressure <3%, and noise error on VMR of the target species <5% at most of the altitudes covered by the standard MIPAS scan, with a total run time of less than 1 min on a modern workstation.

© 2000 Optical Society of America

OCIS Codes
(030.5620) Coherence and statistical optics : Radiative transfer
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(300.6340) Spectroscopy : Spectroscopy, infrared

History
Original Manuscript: July 27, 1999
Revised Manuscript: December 8, 1999
Published: March 10, 2000

Citation
Marco Ridolfi, Bruno Carli, Massimo Carlotti, Thomas von Clarmann, Bianca M. Dinelli, Anu Dudhia, Jean-Marie Flaud, Michael Höpfner, Paul E. Morris, Piera Raspollini, Gabriele Stiller, and Robert J. Wells, "Optimized forward model and retrieval scheme for MIPAS near-real-time data processing," Appl. Opt. 39, 1323-1340 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-8-1323

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