16 August 1983 Study Of Atmospheric Infrared Emission Using A Balloon-Borne Cryogenic Fourier Spectrometer
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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.
© (1983) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
H. Sakai, T. C. Li, W. Barowy, S. Pulchtopek, J. Pritchard, F. J. Murcray, F. H. Murcray, G. Vanasse, "Study Of Atmospheric Infrared Emission Using A Balloon-Borne Cryogenic Fourier Spectrometer", Proc. SPIE 0364, Technologies of Cryogenically Cooled Sensors and Fourier Transform Spectrometers II, (16 August 1983); doi: 10.1117/12.934180; https://doi.org/10.1117/12.934180
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KEYWORDS
Interferometers

Sensors

Spectroscopy

Infrared radiation

Infrared spectroscopy

Cryogenics

Black bodies

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