Overview of the SOFIA Telescope Assembly Software Simulator

Details Overview of the SOFIA Telescope Assembly Software Simulator Overview of the SOFIA Telescope Assembly Software Simulator

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..411..485b&link_type=abstract

Astronomical Data Analysis Software and Systems XVIII ASP Conference Series, Vol. 411, proceedings of the conference held 2-5 No

Astronomy and Astrophysics

Astronomy

2

Scientific paper

The Stratospheric Observatory for Infrared Astronomy (SOFIA) is an airborne astronomical observatory comprised of a 2.5 m infrared telescope mounted in the aft section of a Boeing 747SP aircraft that will fly at operational altitudes between 37,000 and 45,000 arcmin, above 99% of atmospheric water vapor. The telescope is a bent cassegrain design with the primary mirror assembly housed in a cavity that is open to the ambient atmosphere at altitude. The Telescope Assembly (TA) is supported by a spherical bearing mounted in a pressure bulkhead that is forward of the open cavity. Three Tracker cameras provide closed-loop guiding capability for observations of astronomical targets. The TA simulator (TASim) serves as a software surrogate for the TA hardware, including the Secondary Mirror Assembly and Tracker systems. In order to support Mission Control and Command System (MCCS) development and integration, the simulator is fully compatible with the TA-MCCS functional interface and implements appropriate simulations of physical behavior and timing. In addition, the Tracker simulator provides a simulated image of the sky for all three SOFIA guide cameras. In this paper we present an overview of the TASim software for SOFIA, including its utility in observatory integration and mission planning activities.

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