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A ground calibration facility for Herschel-SPIRE

Collins, P., Ade, Peter A. R., Caldwell, Martin E., Ferlet, M., Griffin, Matthew Joseph, Hargrave, Peter Charles, Harman, M. R., Smith, D. L. and Swinyard, B. M. 2003. A ground calibration facility for Herschel-SPIRE. Presented at: IR space telescopes and instruments, Waikoloa, Hawaii, USA, 24-28 August 2002. Published in: Mather, John C. ed. IR space telescopes and instruments: 24-28 August 2002, Waikoloa, Hawaii. Proceedings of the SPIE , vol. 4850. Bellingham, WA: SPIE, pp. 628-637. 10.1117/12.461568

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We describe the requirements and the main design features of the ground test and calibration facility for the Herschel SPIRE instrument. SPIRE has a large cold focal plane unit (approx 700 x 400 x 400 mm) with several internal temperature stages, and is designed to operate in orbit viewing a low emissivity 80-K telescope. The calibration facility is designed to allow all aspects of instrument behaviour, performance, calibration, and optimisation of observing modes to be investigated under flight representative conditions. The facility includes the following features: - A large test cryostat replicating the in-orbit thermal environment - An external telescope simulator and sub-millimetre sources allowing the instrument to be fed with a beam that accurately simulates the beam from the Herschel telescope. - Internal cold black body for absolute radiometric and flat field calibration - Cold neutral density filters and an internal shutter for control of the photon background conditions - A far infrared laser used for spectral calibration of the SPIRE spectrometer channel and to present a source with well understood beam modes to the instrument. - An external FTS to characterise the spectral response of the instrument in both the camera and spectrometer channel The ground test facility will be used to evaluate the flight model before delivery and will also be used to house and carry out tests on the flight spare focal plane unit both before launch and during mission operations.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Black bodies ; Calibration ; Cameras ; Equipment and services ; Far infrared lasers ; Optical filtering ; Orbital dynamics ; Photons ; Spectral calibration ; Spectrometers
Publisher: SPIE
ISBN: 9780819446299
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Last Modified: 04 Jun 2017 04:28

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