Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982spie..332...24g&link_type=abstract
IN: International Conference on Advanced Technology Optical Telescopes, Tucson, AZ, March 11-13, 1982, Proceedings (A83-30976 13
Astronomy and Astrophysics
Astronomy
Electronic Control, Embedded Computer Systems, Mirrors, Reflecting Telescopes, Data Acquisition, Digital Television, Error Signals, Minicomputers, Photoelectricity, Radiation Detectors
Scientific paper
Attention is given to the aspects of the Multiple Mirror Telescope's (MMT) operation that depend on computers for control. The MMT's altitude azimuth mount requires the continuous conversion of celestial coordinates into local terrestrial ones by a 16-bit minicomputer, which generates an error signal that corrects the telescope drives. The telescope coalignment system requires computer analyses of a digitized TV frame, as well as computer control of the tilt and focus of each of the six telescope secondary mirrors. All MMT data is collected by digitizing signals from photoelectric detectors in the astronomical instrumentation. The MMT accordingly employs three computers for the specific tasks of tracking, coaligning and data collecting. System software is written in a sophisticated dialect of FORTH which allows multitasking.
Gilmore David Kirk
Goring W. P.
McClain D. B.
Montgomery W. Jr. J.
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