Title: Thermal Infrared Compact Imaging Spectrometer (TIRCIS): instrument update and preliminary volcanic gas composition measurements
Presenting Author: Robert Wright
Organization: Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu
Co-Author(s): Paul Lucey, Sarah Crites, Mark Wood, Harold Garbeil and Andrea Gabrieli

Abstract:
The TIRCIS instrument is currently being fabricated, with optical elements, structural elements, and the primary calibration unit complete. This talk will provide an overview of progress in the development of the instrument. In addition, I will present some preliminary measurements that we have made of volcanic gas plume composition, using a combination of laboratory and field measurements. Using gas cells filled with and sulfur dioxide (in concentrations that scale with the path concentration of SO2 found in real volcanic plumes), we are establishing how well imaging interferometry can be used to quantify the flux of volcanic gas into the atmosphere, under a range of relevant observations conditions (i.e. observing the gas plume in both emission and absorption).