کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5427259 | 1508624 | 2017 | 8 صفحه PDF | دانلود رایگان |
- Measurements of foreign broadening coefficients for Mars-TLS specific methane lines.
- Spectral parameters were deduced from Speed-dependent Voigt profile with line mixing effects taken into account.
- A thorough comparison of different line profile fits for the Mars-TLS methane lines. The fitted broadening coefficients and areas deviated up to 30% and 4%, respectively, when comparing the speed-dependent Voigt profile (with Rosenkrantz line-mixing) with the simplest Voigt profile.
- Foreign broadening coefficients were measured within a precision of 2.2%.
Molecular line parameters of foreign- broadening by air, carbon dioxide, and helium gas have been experimentally determined for infrared ro-vibrational spectral lines of methane isotopologues (12CH4 and 13CH4) at 3057Â cmâ1 targeted by the Tunable Laser Spectrometer (TLS) in the Sample Analysis at Mars (SAM) instrument suite on the Mars Science Laboratory (MSL) Curiosity rover. From multi-spectrum analyses with the speed-dependent Voigt line profile with Rosenkrantz line-mixing, speed-dependence and line-mixing effects were quantified for methane spectra at total pressures up to 200 mbar. The fitted air-broadening coefficients deviated from 8-25% to those reported in the HITRAN-2012 database.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 191, April 2017, Pages 59-66