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Proceedings Paper

Timing control and signal processing design of the MOPITT instrument
Author(s): Dennis Henry; John P. Hackett; James R. Drummond; Roger Colley
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Paper Abstract

The MOPITT instrument operates on the principle of correlation spectroscopy where the incoming signal is modulated by gas filter and chopper mechanisms and synchronously demodulated within the signal processing system. The performance and flexibility required by the MOPITT instrument resulted in the development of a novel timing control and signal processing design. This design synchronizes modulation and demodulation from a central programmable timing control unit. The data collection system performs a highly linear sigma-delta analog-to-digital conversion prior to signal demodulation. The demodulation operation includes data averaging which reduces the sampled signal bandwidth and extends the signal to noise ratio of the data to in excess of the analog-to-digital converter's rated 16-bit dynamic range.

Paper Details

Date Published: 8 February 2002
PDF: 9 pages
Proc. SPIE 4486, Infrared Spaceborne Remote Sensing IX, (8 February 2002); doi: 10.1117/12.455103
Show Author Affiliations
Dennis Henry, COM DEV International Ltd. (Canada)
John P. Hackett, COM DEV International Ltd. (Canada)
James R. Drummond, Univ. of Toronto (Canada)
Roger Colley, Canadian Space Agency (Canada)


Published in SPIE Proceedings Vol. 4486:
Infrared Spaceborne Remote Sensing IX
Marija Strojnik; Bjorn F. Andresen, Editor(s)

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