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Proceedings Paper

Study Of Atmospheric Infrared Emission Using A Balloon-Borne Cryogenic Fourier Spectrometer
Author(s): H. Sakai; T. C. Li; W. Barowy; S. Pulchtopek; J. Pritchard; F. J. Murcray; F. H. Murcray; G. Vanasse
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Paper Abstract

A cryogenically cooled Fourier interferometer spectrometer capable of producing a 0.1 cm-1 resolution was constructed for the primary objective of observing the infrared atmospheric emission spectrum at various balloon altitudes. The instrument was a Michelson interferometer equipped with a Ge beamsplitter coated on a KC1 substrate and two cat's-eye retroreflectors, one stationary and another movable. The entire interferometer was kept at temperature of 77°K in a cryogenic chamber. The optical path difference of the interferometer was monitored by a HeNe laser line at 6329.9A which was provided to the interferometer circuit from a single-frequency cw HeNe laser mounted outside the cryogenic chamber. The spectrometer with a GeCu detector and its auxiliaries were flown on 7 October 1981 at Holloman AFB, producing the analyzable data at altitude of 27000 ~ 28000 m along both the horizontal and the vertical line of sight for more than 2 hours. The interferogram data with other various data were transmitted to the ground station from the balloon package via telemetry radio link. In the post-flight process, the interferogram data were extracted from the telemetry signal recorded on a magnetic tape and then they were converted to the spectral data using the CDC Cyber computer.

Paper Details

Date Published: 16 August 1983
PDF: 8 pages
Proc. SPIE 0364, Technologies of Cryogenically Cooled Sensors and Fourier Transform Spectrometers II, (16 August 1983); doi: 10.1117/12.934180
Show Author Affiliations
H. Sakai, University of Massachusetts (United States)
T. C. Li, University of Massachusetts (United States)
W. Barowy, University of Massachusetts (United States)
S. Pulchtopek, University of Massachusetts (United States)
J. Pritchard, Idealab, Inc. (United States)
F. J. Murcray, University of Denver (United States)
F. H. Murcray, University of Denver (United States)
G. Vanasse, Air Force Geophysics Laboratory (United States)

Published in SPIE Proceedings Vol. 0364:
Technologies of Cryogenically Cooled Sensors and Fourier Transform Spectrometers II
Ronald J. Huppi, Editor(s)

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