Mapping the infrared background radiation from the Shuttle

Astronomy and Astrophysics – Astronomy

Scientific paper

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Background Radiation, Infrared Radiation, Space Shuttle Orbiters, Spaceborne Astronomy, Spaceborne Telescopes, Thematic Mapping, Airborne/Spaceborne Computers, Display Devices, Focal Plane Devices, Infrared Telescopes, Spacecraft Electronic Equipment, Spacelab

Scientific paper

The Spacelab-2 Small Helium-Cooled Infrared Telescope will be used to map extended astronomical sources of low surface brightness emission, to measure the Shuttle induced environment and to develop techniques for managing large volumes of superfluid helium in space. The instrument is an f/4 15.2-cm Herschelian telescope with ten photoconductor detectors in the focal plane. This paper describes the hardware and software aspects of the instrument with emphasis on mission operations. In particular, a description is given of the observing plan formulated to meet the scientific and engineering objectives, the scan drive system, the precautions in design and operation necessary to prevent the sun, moon, and earth from adversely affecting the observations, the implications of thruster firings, and the on-board experiment computer application software to control the scanning of the telescope and support on-board displays.

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