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Proceedings Paper

Wide-field Infrared Survey Explorer science payload update
Author(s): Mark F. Larsen; Harri Latvakoski; Amanda K. Mainzer; Scott Schick; Joel Drake
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Paper Abstract

The Wide Field Infrared Survey Explorer is a NASA Medium Class Explorer mission to perform a high-sensitivity, high resolution, all-sky survey in four infrared wavelength bands. The science payload is a 40 cm aperture cryogenically cooled infrared telescope with four 10242 infrared focal plane arrays covering from 2.8 to 26 μm. Mercury cadmium telluride (MCT) detectors are used for the 3.3 μm and 4.6 μm channels, and Si:As detectors are used for the 12 μm and 23 μm wavelength channels. A cryogenic scan mirror freezes the field of view on the sky over the 9.9-second frame integration time. A two-stage solid hydrogen cryostat provides cooling to temperatures less than 17 K and 8.3 K at the telescope and Si:As focal planes, respectively. The science payload collects continuous data on orbit for the seven-month baseline mission with a goal to support a year-long mission, if possible. As of the writing of this paper, the payload subassemblies are complete, and the payload has begun integration and test. This paper provides a payload overview and discusses instrument status and performance.

Paper Details

Date Published: 12 July 2008
PDF: 8 pages
Proc. SPIE 7010, Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter, 70100G (12 July 2008); doi: 10.1117/12.789672
Show Author Affiliations
Mark F. Larsen, Space Dynamics Lab., Utah State Univ. (United States)
Harri Latvakoski, Space Dynamics Lab., Utah State Univ. (United States)
Amanda K. Mainzer, Jet Propulsion Lab. (United States)
Scott Schick, Practical Technology Solutions, Inc. (United States)
Joel Drake, Space Dynamics Lab., Utah State Univ. (United States)


Published in SPIE Proceedings Vol. 7010:
Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter
Jacobus M. Oschmann; Mattheus W. M. de Graauw; Howard A. MacEwen, Editor(s)

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