The airborne observatory SOFIA (Stratospheric Observatory for Infrared Astronomy) is undergoing a modernization of
its tracking system. This included new, highly sensitive tracking cameras, control computers, filter wheels and other
equipment, as well as a major redesign of the control software. The experiences along the migration path from an aged
19" VMbus based control system to the application of modern industrial PCs, from VxWorks real-time operating system
to embedded Linux and a state of the art software architecture are presented. Further, the concept is presented to operate
the new camera also as a scientific instrument, in parallel to tracking.
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