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Proceedings Paper

SABER instrument design update
Author(s): Roy W. Esplin; Lorin Zollinger; J. Clair Batty; Steven L. Folkman; Mehrdad Roosta; Joseph J. Tansock Jr.; Mark Jensen; John L. Stauder; Jim Miller; Michael D. Vanek; Don M. Robinson
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Paper Abstract

This paper describes the design of a 10-channel infrared (1.27 to 16.9 micrometers ) radiometer instrument known as SABER (sounding of the atmosphere using broadband emission radiometry) that will measure earth-limb emissions from the TIMED (thermosphere- ionosphere-mesosphere energetics and dynamics) satellite. The instrument telescope, designed to reject stray light from the earth and the atmosphere, is an on-axis Cassegrain design with a clam shell reimager and a one-axis scan mirror. The telescope is cooled below 210 K by a dedicated radiator. The focal plane assembly (consisting of a filter array, a detector array, a Lyot stop, and a window) is cooled to 75 K by a miniature cryogenic refrigerator. The conductive heat load on the refrigerator is minimized by a Kevlar support system that thermally isolates the focal plane assembly from the telescope. Kevlar is also used to thermally isolate the telescope from the spacecraft. Instrument responsivity drifts due to changes in telescope and focal plane temperatures as well as other causes are neutralized by an in-flight calibration system. The detector array consists of discrete HgCdTe, InSb, and InGaAs detectors. Two InGaAs detectors are a new long wavelength type, made by EG&G, that have a long wavelength cutoff of 2.33 micrometers at 77 K.

Paper Details

Date Published: 29 September 1995
PDF: 11 pages
Proc. SPIE 2553, Infrared Spaceborne Remote Sensing III, (29 September 1995); doi: 10.1117/12.221361
Show Author Affiliations
Roy W. Esplin, Utah State Univ. (United States)
Lorin Zollinger, Utah State Univ. (United States)
J. Clair Batty, Utah State Univ. (United States)
Steven L. Folkman, Utah State Univ. (United States)
Mehrdad Roosta, Utah State Univ. (United States)
Joseph J. Tansock Jr., Utah State Univ. (United States)
Mark Jensen, Utah State Univ. (United States)
John L. Stauder, Utah State Univ. (United States)
Jim Miller, NASA Langley Research Ctr. (United States)
Michael D. Vanek, NASA Langley Research Ctr. (United States)
Don M. Robinson, NASA Langley Research Ctr. (United States)

Published in SPIE Proceedings Vol. 2553:
Infrared Spaceborne Remote Sensing III
Marija Strojnik; Bjorn F. Andresen, Editor(s)

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