Physics
Scientific paper
Feb 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jbis...32...70c&link_type=abstract
British Interplanetary Society, Journal (Satellite Control and Data Processing), vol. 32, Feb. 1979, p. 70-76. Research supporte
Physics
Airborne/Spaceborne Computers, Data Management, Microprocessors, Satellite-Borne Photography, Solar Maximum Mission, X Ray Spectroscopy, Electronic Control, Nasa Programs, Onboard Equipment, Proportional Counters, Satellite Design, Spaceborne Experiments
Scientific paper
This paper describes a spacecraft experiment controlled by two mutually redundant microprocessors, Intersil 6100A. Each has 8K words of RAM and 2K words of ROM. The systems operate alternately in data accumulation-data processing modes under the master control of a designated microprocessor. They regulate the instrument high voltage, both to avoid radiation belt damage and to calibrate the X-ray proportional counters. When high time resolution is required, the computers only transmit those parts of the X-ray images relevant to the current solar physics problem under study. A flare location programme gives the position of the flare, to within 8 arc sec, to the spacecraft at 2 seconds notice. The experiment may be completely reprogrammed from the ground.
Charlton C. P.
Fryer R. J.
Simnett George M.
Wilson W. G. J.
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