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Proceedings Paper

On sky testing of the SOFIA telescope in preparation for the first science observations
Author(s): Franziska Harms; Jürgen Wolf; Patrick Waddell; Edward Dunham; Andreas Reinacher; Ulrich Lampater; Holger Jakob; Lisa Bjarke; Sybil Adams; Randy Grashuis; Allan Meyer; Kenneth Bower; Keith Schweikhard; Thomas Keilig
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Paper Abstract

SOFIA, the Stratospheric Observatory for Infrared Astronomy, is an airborne observatory that will study the universe in the infrared spectrum. A Boeing 747-SP aircraft will carry a 2.5 m telescope designed to make sensitive infrared measurements of a wide range of astronomical objects. In 2008, SOFIA's primary mirror was demounted and coated for the first time. After reintegration into the telescope assembly in the aircraft, the alignment of the telescope optics was repeated and successive functional and performance testing of the fully integrated telescope assembly was completed on the ground. The High-speed Imaging Photometer for Occultations (HIPO) was used as a test instrument for aligning the optics and calibrating and tuning the telescope's pointing and control system in preparation for the first science observations in flight. In this paper, we describe the mirror coating process, the subsequent telescope testing campaigns and present the results.

Paper Details

Date Published: 2 September 2009
PDF: 15 pages
Proc. SPIE 7453, Infrared Spaceborne Remote Sensing and Instrumentation XVII, 745303 (2 September 2009); doi: 10.1117/12.828609
Show Author Affiliations
Franziska Harms, Univ. Stuttgart (Germany)
NASA Ames Research Ctr. (United States)
Jürgen Wolf, Univ. Stuttgart (Germany)
NASA Ames Research Ctr. (United States)
Patrick Waddell, NASA Ames Research Ctr. (United States)
Universities Space Research Association (United States)
Edward Dunham, Lowell Observatory (United States)
Andreas Reinacher, Univ. Stuttgart (Germany)
NASA Dryden Flight Research Ctr. (United States)
Ulrich Lampater, Univ. Stuttgart (Germany)
NASA Dryden Flight Research Ctr. (United States)
Holger Jakob, Univ. Stuttgart (Germany)
NASA Dryden Flight Research Ctr. (United States)
Lisa Bjarke, NASA Ames Research Ctr. (United States)
NASA Dryden Flight Research Ctr. (United States)
Sybil Adams, NASA Ames Research Ctr. (United States)
Universities Space Research Association (United States)
Randy Grashuis, NASA Ames Research Ctr. (United States)
Universities Space Research Association (United States)
Allan Meyer, NASA Ames Research Ctr. (United States)
Universities Space Research Association (United States)
Kenneth Bower, NASA Ames Research Ctr. (United States)
Universities Space Research Association (United States)
Keith Schweikhard, NASA Dryden Flight Research Ctr. (United States)
Thomas Keilig, Univ. Stuttgart (Germany)
NASA Dryden Flight Research Ctr. (United States)


Published in SPIE Proceedings Vol. 7453:
Infrared Spaceborne Remote Sensing and Instrumentation XVII
Marija Strojnik, Editor(s)

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