1. Trace Gas Retrievals for the ExoMars Trace Gas Orbiter (TGO) Atmospheric Chemistry Suite (ACS) mid-infrared channel during the first year of operation.
- Author
-
Olsen, Kevin, Alday, Juan, Baggio, Lucio, Belyaev, Denis, Fedorova, Anna, Grigoriev, Alexey, Korablev, Oleg, Montmessin, Franck, Patrakeev, Andrey, Shakun, Alexey, and Trokhimovskiy, Alexander
- Subjects
- *
TRACE gases , *ATMOSPHERIC chemistry , *WATER vapor , *IMAGE converters , *PHOTOACOUSTIC spectroscopy , *WATER , *SULFUR - Abstract
The ExoMars Trace Gas Orbiter began science operations in April 2018. We report on dataprocessing and analysis for the Atmospheric Chemistry Suite mid-infrared channel(ACSMIR) for the first year of operations. ACS MIR is a cross-dispersion spectrometer operatingin solar occultation mode. Level 0 data (raw detector images) are processed at the SpaceResearch Institute in Moscow (IKI) and spectral and wavenumber calibration areperformed at LATMOS in Paris to produce a level 1 data product of transmissionspectra. Trace gas retrievals are performed at LATMOS with the JPL Gas Fittingsoftware (GFIT). We present retrievals of volume mixing ratio (VMR) verticalprofiles of major gas species (CO, H2O, HDO) and the current state of our searchfor undetected gases (e.g., hydrocarbons, sulphur and chlorine bearing species).Preliminary results show a dependence on latitude for CO above 50 km, a correlationbetween water vapour content and dust loading, and low upper limits for CH4. [ABSTRACT FROM AUTHOR]
- Published
- 2019