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Signal-to-noise ratios of multiplexing spectrometers in high backgroundsSignal-to-noise ratios and the amount of multiplexing gain achieved with a Michelson spectrometer during detector and background noise are studied. Noise caused by the warm background is found in 10 and 20-micron atmospheric windows in high resolution Fourier spectroscopy. An equation is derived for the signal-to-noise ratio based on the number of channels, total time to obtain the complete spectrum, the signal power in one spectral element, and the detector noise equivalent power in the presence of negligible background. Similar expressions are derived for backgrounds yielding a noise equivalent power to a spectral element, and backgrounds having flat spectra in the frequency range under investigation.
Document ID
19780042382
Document Type
Reprint (Version printed in journal)
Authors
Knacke, R. F.
Date Acquired
August 9, 2013
Publication Date
March 1, 1978
Publication Information
Publication: Applied Optics
Volume: 17
Subject Category
INSTRUMENTATION AND PHOTOGRAPHY
Funding Number(s)
CONTRACT_GRANT: NSG-7286
Distribution Limits
Public
Copyright
Other