Airborne nondispersive infrared monitor for atmospheric trace gases
- 1 November 1978
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 49 (11) , 1520-1525
- https://doi.org/10.1063/1.1135304
Abstract
An airborne gas-filter correlation analyzer was designed and assembled to monitor atmospheric trace gases. Flight tests indicated that a methane version of this nondispersive infrared instrument performed properly while measuring CH(4) concentration profiles as small as 1 ppm from altitudes of 0.15 up to 1.2 km. A unique multiple chopping scheme was developed to simplify the gas-filter technique and to provide an easy mechanical nulling procedure. The single-beam rotating-cell optical system integrated with a multipass sampling cell and the signal processing circuit are described in detail.Keywords
This publication has 3 references indexed in Scilit:
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- Recording Infra-Red Analyzers for Butadiene and Styrene Plant Streams*Journal of the Optical Society of America, 1946