Contamination control of the Infrared Astronomical SatelliteThe Infrared Astronomical Satellite, to be launched in August 1981, will perform an all-sky survey in the 8-120 micron wavelength region. High sensitivity to thermal radiation and the low operating temperature of optics and thermal control surfaces make the IRAS telescope extremely vulnerable to contamination. Four special topics of importance are discussed in this paper: (1) deposition of atmospheric gases; (2) sighting of particles released from the satellite; (3) functions of a deployable aperture cover; and (4) degradation of a radiatively cooled sunshade from spacecraft outgassing. These topics demonstrate how mission strategy, ground cleaning and handling, and hardware design are used to avoid contamination which would degrade telescope performance.
Document ID
19810048023
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Andreozzi, L. C. (Ball Corp. Aerospace Systems Div., Boulder, Colo., United States)
Irace, W. R. (Ball Aerospace Systems Div. Boulder, CO, United States)
Maag, C. R. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1980
Subject Category
Spacecraft Instrumentation
Meeting Information
Meeting: Seminar on Optics in adverse environments