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Proceedings Paper

Wide-field infrared survey explorer science payload update
Author(s): Mark F. Larsen; Scott Schick; Brett Lloyd; Harri Latvakoski; Joel Drake
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Paper Abstract

The Wide Field Infrared Survey Explorer is a NASA Medium Class Explorer mission to perform an all-sky survey in four infrared wavelength bands. The science payload is a cryogenically cooled infrared telescope with four 10242 infrared focal plane arrays covering from 2.8 to 26 μm. Advances in focal plane technology and a large aperture cryogenic telescope allow an all-sky survey to be performed with high sensitivity and resolution. An efficient survey is obtained using a cryogenic scan mirror to freeze the field of view on the sky over the 9.9-second frame integration time. Mercury cadmium telluride (MCT) detectors, cooled to 32 K, are used for the two midwave channels (3.3 μm and 4.6 μm), and Si:As detectors, cooled to < 8.3 K, are used for the two long wavelength channels (12 μm and 23 μm). Cooling is provided by a two-stage solid hydrogen cryostat which provides temperatures < 17 K and < 8.3 K at the telescope and Si:As focal planes, respectively. The science payload supports operations on orbit for the seven-month baseline mission with a goal to support a 13-month extended mission, if possible. The payload recently passed CDR and is being fabricated. This paper provides a payload overview and discusses instrument requirements and performance.

Paper Details

Date Published: 7 September 2006
PDF: 11 pages
Proc. SPIE 6297, Infrared Spaceborne Remote Sensing XIV, 62970R (7 September 2006); doi: 10.1117/12.684133
Show Author Affiliations
Mark F. Larsen, Utah State Univ. (United States)
Scott Schick, Utah State Univ. (United States)
Brett Lloyd, Utah State Univ. (United States)
Harri Latvakoski, Utah State Univ. (United States)
Joel Drake, Utah State Univ. (United States)

Published in SPIE Proceedings Vol. 6297:
Infrared Spaceborne Remote Sensing XIV
Marija Strojnik, Editor(s)

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