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Infrared heterodyne spectroscopy of astronomical and laboratory sources at 8.5 micronThe first infrared heterodyne spectrometer using tuneable semiconductor (PbSe) diode lasers has been constructed and was used near 8.5 micron to measure absorption line profiles of N2O in the laboratory and black body emission from the Moon and from Mars. Spectral information was recorded over a 200 MHz bandwidth using an 8-channel filter bank. The resolution was 25 MHz and the minimum detectable (black body) power was 1 x 10 to the minus 16th power watts for 8 minutes of integration. The results demonstrate the usefulness of heterodyne spectroscopy for the study of remote and local sources in the infrared.
Document ID
19740024782
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Mumma, M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kostiuk, T. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Cohen, S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Buhl, D. (Natl. Radio Astron. Obs. Greenbank, West Va., United States)
Vonthuna, P. C. (Arthur D. Little, Inc., Chambridge Mass., United States)
Date Acquired
September 3, 2013
Publication Date
August 1, 1974
Subject Category
Instrumentation And Photography
Report/Patent Number
NASA-TM-X-70744
X-691-74-237
Accession Number
74N32895
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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