IRAS cryogenic system flight performance reportIt is pointed out that the Infrared Astronomical Satellite (IRAS) is the first telescope to perform observations in the far infrared from orbit. IRAS was launched on January 25, 1983 into a 900 km orbit. The use of the first large superfluid helium dewar in space makes it possible to provide a 2 K telescope environment for an anticipated period of one year. A description of the cryogenic system of IRAS is presented, taking into account the superfluid helium tank, the insulation system, the vacuum shell, the aperture cover, and the fluid management system. The dynamic performance of the cryogenic system is considered along with aspects of prelaunch preparations. Details of flight performance are also discussed, giving attention to transient performance, and steady state performance.
Document ID
19850044361
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Urbach, A. R. (Ball Corp. Ball Aerospace Systems Div., Boulder, CO, United States)
Mason, P. V. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)