15 June 1995 Remote sensing with a triple correlation spectrometer for trace gas identification
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We showed that the output of a cross-correlation with gas spectra could be triple-correlated to reduce the effects of Gaussian noise for improved discrimination. Such processing is directly applicable to a correlation spectrometer but could be applied to other designs. In spite of the added processing, triple-correlating the output of a spectrometer allowed us to generally increase the SNR by over a factor of ten. We were able to discriminate between two gases at low SNR values with the triple correlation technique.
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Samuel Peter Kozaitis, Samuel Peter Kozaitis, Bruce James Bradshaw, Bruce James Bradshaw, } "Remote sensing with a triple correlation spectrometer for trace gas identification", Proc. SPIE 2471, Atmospheric Propagation and Remote Sensing IV, (15 June 1995); doi: 10.1117/12.211946; https://doi.org/10.1117/12.211946

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