Physics
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mss..confetg09w&link_type=abstract
"International Symposium On Molecular Spectroscopy, 64th Meeting, Held 22-26 June, 2009 at Ohio State University. http://molspec
Physics
Infrared/Raman
Scientific paper
Water spectra in the 1 μm region were recorded with the Bruker IFS120HR spectrometer located in Oberpfaffenhofen, Germany. Nineteen measurements in the temperature range 230 to 320 K, water pressures from 1 to 16 mb, and air pressures from 0 to 1000 mb were taken at an absorption path of 80 m. The peak-to-peak noise level was in the order of 0.1%, allowing a detailed study of the line profiles. The Galatry and speed-dependent Voigt profiles were used to fit the lines within the noise level. The dependence of the Dicke narrowing parameter on quantum numbers and pressure will be discussed. A detailed error assessment was performed for using the Voigt profile alone, i.e. omitting Dicke narrowing. Consequences for the spectroscopic database and the retrieval of atmospheric measurements will be described. Spectroscopic parameters together with estimates on the continuum will be discussed. The work was carried out within the WALES project (Water Vapour Lidar Experiment in Space) and supported by the WDC-RSAT (World Data Center for Remote Sensing of the Atmosphere).
Birk Manfred
Wagner Georg
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