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Proceedings Paper

Airborne HTS Spectrometer
Author(s): John A. Decker
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Paper Abstract

We describe in this paper a Hadamard-Transform Spectrometer (HTS) designed for airborne infrared astronomical observations, and, specifically, for airborne observations of the 2.8μ to 3.5μ water-of-hydration absorption band in the reflection spectrum of Mars. This instrument, the Spectral Imaging, Inc., Model HTS-19-1, was designed and construct-ed for Cornell University and flew as one of the three primary experiments on board NASA's Convair 990 observatory aircraft during the 1971 Mars Opposition observations last July and August. As such, it represented the first operational use of Hadamard-transform spectrometry. We describe the design and operation of the Airborne Mars-Observation HTS below, and briefly discuss further applications of this technique to infrared astronomical observations.

Paper Details

Date Published: 1 September 1972
PDF: 8 pages
Proc. SPIE 0028, Instrumentation in Astronomy I, (1 September 1972); doi: 10.1117/12.953548
Show Author Affiliations
John A. Decker, Spectral Imaging, Inc. (United States)


Published in SPIE Proceedings Vol. 0028:
Instrumentation in Astronomy I
Lewis Larmore; Robert W. Poindexter, Editor(s)

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