Cryogenic telescope, scanner, and imaging optics for the Wide-field Infrared Survey Explorer (WISE)

Schwalm, Mark; Akerstrom, Alan; Barry, Mark; Guregian, James; LaMalva, Fran; Laquidara, Peter; Perron, Gerry; Sampath, Deepak; Ugolini, Virginia

doi:10.1117/12.789708

Cited by 6 publications

(9 citation statements)

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“…Schwalm, Hull and others [6][7][8][9] have discussed lessons learned from the IOS WISE and other experience for future NASA Explorer Class Missions. We summarize these below: WISE was not only a technical success, its performance and reliability was accomplished within the stringent budgets and schedules of a NASA Explorer Program.…”

Section: Wise Lessons Learned For Efficient Development Of Explorer Cmentioning

confidence: 99%

Spaceborne telescopes on a budget: paradigms for producing high-reliability telescopes, scanners, and EO assemblies using heritage building blocks

Hull

Schwalm

2011

Sensors and Systems for Space Applications IV

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By starting with established and flown hardware (high Technology Readiness Level (TRL)), and implementing a concurrent engineering environment and seamless team, a mission architect can achieve high reliability and high performance while operating under constrained cost and short implementation schedule. We will describe methods, including those used by the telescope team on the recent Wide-field Infrared Survey Explorer (WISE) mission, to manage cost and realize aggressive schedules. These lessons may be evoked for telescopes addressing defense, security and sensing, as well as those for NASA science.

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Section: Wise Lessons Learned For Efficient Development Of Explorer Cmentioning

confidence: 99%

Spaceborne telescopes on a budget: paradigms for producing high-reliability telescopes, scanners, and EO assemblies using heritage building blocks

Hull

Schwalm

2011

Sensors and Systems for Space Applications IV

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“…Thus far this strategy has worked very well for WISE. The WISE optical system consists of the afocal five-mirror telescope assembly with a 40 cm primary mirror, a cryogenic scan mirror to stabilize the image against the orbital rotation, followed by imaging optics and beamsplitters (Schwalm et al 2005). The instantaneous field of view (FOV) is 47 x 47 arcmin.…”

Section: Figure 4 Payload Subsystems and Key Componentsmentioning

confidence: 99%

Development of the Wide-field Infrared Survey Explorer (WISE) mission

et al. 2008

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WISE is a NASA MIDEX mission to survey the entire sky in four bands from 3 to 25 microns with sensitivity about 500 times greater than the IRAS survey. WISE will find the most luminous galaxies in the universe, find the closest stars to the Sun, and detect most of the main belt asteroids larger than 3 km. WISE launch is scheduled in November, 2009 on a Delta 7320-10 to a 525 km Sun-synchronous polar orbit.This paper gives an overview of WISE including development status and management approach. WISE flight system design is single string with selected redundancy and graceful degradation. Wherever possible, design heritage from prior missions is pursued and properly reviewed to reduce development time and cost. Further risk reduction is achieved since the WISE spacecraft has no deployable mechanisms and no propulsion. Nonetheless, a complex space mission with a sophisticated cryogenic IR telescope such as WISE demands a partnership of multiple organizations in government research, academia, and industry. With a cost cap and relatively short development schedule, it is essential for all WISE partners to work seamlessly together. This is accomplished by a single management team representing all key partners and disciplines in science, systems engineering, mission assurance, project and contract management. WISE uses a variety of management tools including frequent team interaction, schedule, milestone and critical path analysis, risk analysis, reliability analysis, earned value analysis, configuration management, and management of schedule and budget reserves. After a successful mission critical design review in June, 2007, WISE has completed building most of the flight hardware, and started integration and test within payload and spacecraft.

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“…The afocal telescope, scan mirror, and imaging optics were designed and fabricated by L-3 SSG-Tinsley 6 . The optical subassembly mounts into the cryostat and is structurally and thermally tied to the cryostat via the interface flange.…”

Section: Optical Subassemblymentioning

confidence: 99%

Wide-field Infrared Survey Explorer science payload update

Larsen

Latvakoski

Schick³

et al. 2008

Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter

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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 1024 2 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.

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Cryogenic telescope, scanner, and imaging optics for the Wide-field Infrared Survey Explorer (WISE)

Cited by 6 publications

References 0 publications

Spaceborne telescopes on a budget: paradigms for producing high-reliability telescopes, scanners, and EO assemblies using heritage building blocks

Spaceborne telescopes on a budget: paradigms for producing high-reliability telescopes, scanners, and EO assemblies using heritage building blocks

Development of the Wide-field Infrared Survey Explorer (WISE) mission

Wide-field Infrared Survey Explorer science payload update

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