PFS on Mars Express: preparing the analysis of infrared spectra to be measured by the Planetary Fourier Spectrometer

PFS on Mars Express: preparing the analysis of infrared spectra to be measured by the Planetary... A radiative transfer simulation and retrieval technique (RRT) is described that will be applied to derive atmospheric and surface properties of Mars from measured infrared signatures recorded by the Planetary Fourier Spectrometer (PFS) onboard the Mars Express mission in 2003. The RRT considers absorption, emission and multiple scattering of thermal and solar radiation by molecular (CO 2 , H 2 O, CO) and particulate (palagonite, montmorillonite) species. Precalculated sets of absorption cross-sections which are based on quasi-monochromatic line-by-line calculations are used to predict molecular transmission functions at 2.0 cm −1 spectral resolution in a layered atmosphere. Synthetic infrared spectra have been calculated in the 200– 8000 cm −1 wavenumber range (1.25– 50 μm ) for a variety of atmospheric models and surface conditions. The influence of multiple aerosol scattering on the spectra is investigated on the basis of a successive approximation technique. Numerical results are compared with the spherical harmonics discrete ordinate method. Different retrieval procedures and results of a simultaneous retrieval of vertical temperature profiles and aerosol optical depths as well as surface temperature, pressure and reflectance are discussed. Real measurements performed by the IRIS instrument onboard Mariner 9 are also examined. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Planetary and Space Science Elsevier

PFS on Mars Express: preparing the analysis of infrared spectra to be measured by the Planetary Fourier Spectrometer

Planetary and Space Science, Volume 48 (12) – Oct 1, 2000

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Publisher
Elsevier
Copyright
Copyright © 2000 Elsevier Science Ltd
ISSN
0032-0633
eISSN
1873-5088
D.O.I.
10.1016/S0032-0633(00)00116-1
Publisher site
See Article on Publisher Site

Abstract

A radiative transfer simulation and retrieval technique (RRT) is described that will be applied to derive atmospheric and surface properties of Mars from measured infrared signatures recorded by the Planetary Fourier Spectrometer (PFS) onboard the Mars Express mission in 2003. The RRT considers absorption, emission and multiple scattering of thermal and solar radiation by molecular (CO 2 , H 2 O, CO) and particulate (palagonite, montmorillonite) species. Precalculated sets of absorption cross-sections which are based on quasi-monochromatic line-by-line calculations are used to predict molecular transmission functions at 2.0 cm −1 spectral resolution in a layered atmosphere. Synthetic infrared spectra have been calculated in the 200– 8000 cm −1 wavenumber range (1.25– 50 μm ) for a variety of atmospheric models and surface conditions. The influence of multiple aerosol scattering on the spectra is investigated on the basis of a successive approximation technique. Numerical results are compared with the spherical harmonics discrete ordinate method. Different retrieval procedures and results of a simultaneous retrieval of vertical temperature profiles and aerosol optical depths as well as surface temperature, pressure and reflectance are discussed. Real measurements performed by the IRIS instrument onboard Mariner 9 are also examined.

Journal

Planetary and Space ScienceElsevier

Published: Oct 1, 2000

References

  • The spherical harmonics discrete ordinate method for three-dimensional atmospheric radiative transfer
    Evans, K.F.
  • Improved optical properties of the Martian atmospheric dust for radiative transfer calculations in the infrared
    Forget, F.
  • The planetary Fourier spectrometer PFS for the orbiter of the spacecraft Mars 96
    Hirsch, H.; Formisano, V.; Moroz, V.I.; Arnold, G.; Jurewicz, A.; Michel, G.; Lopez-Moreno, J.J.; Piconni, G.; Cafaro, N.
  • The 1996 HITRAN molecular spectroscopic database and HAWKS (HITRAN Atmospheric Workstation)
    Rothman, L.S.; Rinsland, C.P.; Goldman, A.; Massie, S.T.; Edwards, D.P.; Flaud, J.M.; Perrin, A.; Camy-Peyret, C.; Dana, V.; Mandin, J.Y.; Schröder, J.; McCann, A.; Gamache, R.R.; Wattson, R.B.; Yosino, K.; Chance, K.; Jucks, K.; Brown, L.R.; Nemtchinov, V.; Varanasi, P.
  • A fast and accurate method of calculation of gaseous transmission functions in planetary atmospheres
    Titov, D.V.; Haus, R.

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