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Development of a diode laser heterodyne spectrometer and observations of silicon monoxide in sunspotsA state of the art, tunable diode laser infrared heterodyne spectrometer was designed and constructed for ground based observations throughout the 8 to 12 micron atmospheric window. The instrument was optimized for use with presently available tunable diode lasers, and was designed as a flexible field system for use with large reflecting telescopes. The instrument was aligned and calibrated using laboratory and astronomical sources. Observations of SiO fundamental (v = 1-0) and hot band (v = 2-1) absorption features were made in sunspots near 8 microns using the spectrometer. The data permit an unambiguous determination of the temperature pressure relation in the upper layers of the umbral atmosphere, and support the sunspot model suggested by Stellmacher and Wiehr.
Document ID
19820019843
Acquisition Source
Legacy CDMS
Document Type
Thesis/Dissertation
Authors
Glenar, D. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 4, 2013
Publication Date
November 1, 1981
Subject Category
Lasers And Masers
Report/Patent Number
NAS 1.15:83902
NASA-TM-83902
Accession Number
82N27719
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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