Detection of thermal emission from atmospheric gases by laser heterodyne radiometry.

Details Detection of thermal emission from atmospheric gases by laser heterodyne radiometry. Detection of thermal emission from atmospheric gases by laser heterodyne radiometry.

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993infph..34..407c&link_type=abstract

Infrared Phys., Vol. 34, No. 4, p. 407 - 413

Physics

2

Scientific paper

A gaseous component is considered as a self emitting source that can be detected and characterized remotely by its thermal emission spectrum. The required spectrum analyser should have an appropriately narrow bandwidth. For an atmospheric component, with isolated absorption lines, the linewidths are about 0.1 cm-1 or 3 GHz under standard conditions. This leads to the need for a high resolution radiometer. A laser heterodyne radiometer (LHR) has been used to detect the emission of two components (C2H4 and NH3) at 10 μm wavelength under atmospheric pressure.

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