Physics – Optics
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apopt..16.1732g&link_type=abstract
Applied Optics, vol. 16, June 1977, p. 1732-1735.
Physics
Optics
3
Earth Atmosphere, Emission Spectra, Jupiter Atmosphere, Molecular Spectra, Spectral Line Width, Atmospheric Composition, Fabry-Perot Interferometers, Fourier Transformation, Instrument Errors
Scientific paper
The physical conditions in laboratory gases and in the upper atmosphere of the planets, including earth, can be deduced from a measurement of the intensity and line profile of different radiating molecules. Because of the low pressures in the upper atmospheres, many molecular lines with small pressure-broadening coefficients are collisionally narrowed. These lines are resolvable with a Fabry-Perot interferometer. Analytical expressions are given relating the measured line intensity and profile to the true line intensity and profile. A deconvolution of the measured profile gives the parameters A, beta, and K characterizing the collisionally narrowed Galatry profile. General expressions for the nonideal interferometer are discussed, and, specifically, mirror defects and a limited detector aperture are treated.
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