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| Titel |
Influence of line parameters on H2O and HCl retrievals from VEX/SOIR spectra. |
| VerfasserIn |
S. Robert, A. Mahieux, N. Weiler, V. Wilquet, R. Drummond, A. C. Vandaele, J. Vander Auwera, R. R. Gamache, J.-L. Bertaux |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250064399
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| Zusammenfassung |
| The SOIR instrument, a channel of the SPICAV instrument suite onboard Venus
Express (VEX), performs solar occultation measurements in the IR region (2.2 –
4.3 μm) at a resolution of 0.12 cm-1, the highest onboard the spacecraft [1]. It
combines an echelle spectrometer and an Acousto-Optical Tunable Filter for order
selection.
The wavelength range probed by SOIR allows a detailed chemical inventory of the Venus
atmosphere at the terminators in the upper mesosphere and lower thermosphere (70 to 170
km) with an emphasis on vertical distribution of the gases (CO2, CO, H2O, HCl, HF,
-¦).
Thanks to the sensitivity of the SOIR instrument it may be possible to study line profiles.
Broadening parameters for H2O, HDO and HCl bands have recently been published, by
Gamache et al. [2] and Tudorie et al. [3]. Those parameters have been implemented to fit
SOIR spectra, using the ASIMAT code [4]. The results in terms of retrieved densities will be
compared with those obtained using HITRAN2008 [5], the spectroscopic database developed
mainly for the Earth’s atmosphere.
References
[1]Â Â Â Nevejans, D., et al., Applied Optics, 2006. 45(21): p. 5191-5206.
[2]Â Â Â Gamache, R.R., et al., Icarus, 2011. 213(2): p. 720–730.
[3]Â Â Â Tudorie, M., et al., J. Quant. Spectrosc. Radiat. Transfer, 2012. (submitted)
[4]Â Â Â Mahieux, A., et al., J. Geophys. Res., 2010. 115(E12014).
[5]Â Â Â Rothman, L.S., et al., J. Quant. Spectrosc. Radiat. Transfer, 2009. 110(9-10):
p. 533-572. |
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