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A solar infrared photometer for space flight applicationA photometer concept which is capable of nearly simultaneous measurements of solar radiation from 1.6 to 200 microns in seven wavelength bands is described. This range of wavelengths can probe the solar photosphere from below the level of unit optical depth in the visible to the temperature minimum, about 500 km above it. An instrument package including a 20-cm Gregorian telescope and a filter wheel photometer utilizing noncryogenic pyroelectric infrared detectors is described. Approaches to the rejection of the visible solar spectrum in the instrument, the availability of optical and mechanical components, and the expected instrumental sensitivity are discussed. For wavelengths below 35 microns, the projected instrumental sensitivity is found to be adequate to detect the intensity signature of solar p-mode oscillations during 5 min of integration. For longer wavelengths, clear detection is expected through Fourier analysis of modest data sets.
Document ID
19910071893
Document Type
Reprint (Version printed in journal)
Authors
Kostiuk, Theodor (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Deming, Drake (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Infrared Physics
Volume: 32
ISSN: 0020-0891
Subject Category
SPACECRAFT INSTRUMENTATION
Distribution Limits
Public
Copyright
Other