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- Title
BACKGROUND CONTRIBUTIONS IN DIRECT AND DIFFERENTIAL FOURIER TRANSFORM LWIR MEASUREMENTS:: A COMPARATIVE ANALYSIS.
- Authors
Bouffard, François; Thériault, Jean-Marc
- Abstract
In order to assess the differences between background clutter using the CATSI instrument in direct (single-beam) and differential (double-beam) mode, a survey of background measurements was undertaken. Measurements include samples of sky, mountains, forest, buildings, roads and snow during springtime in the long wave infrared using both single-beam and double-beam interferometry. It is found that background distribution and statistics in these two modes are significantly different, with the differential mode presenting less variation than the direct mode. This may impact the ability to detect atmospheric contaminants. This analysis was performed in order to better understand the difference between operating a standard and a differential FTIR instrument.
- Subjects
AIR pollution measurement; FOURIER transform infrared spectroscopy; INTERFEROMETERS -- Design &; construction; INTERFEROMETRY; BACKGROUND radiation; EQUIPMENT &; supplies
- Publication
International Journal of High Speed Electronics & Systems, 2008, Vol 18, Issue 2, p263
- ISSN
0129-1564
- Publication type
Article
- DOI
10.1142/S0129156408005333