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Proceedings Paper

Autofib--2 software control systems and user operation
Author(s): Ian J. Lewis; Lewis R. Jones; Ian Robert Parry
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Paper Abstract

The first part of this paper describes the microcomputer software that controls the individual mechanisms of the Autofib-2 instrument. All previous microprocessor systems built for the William Herschel Telescope used a variant of the Forth language to implement the control system; however, Autofib-2 is the first instrument to be controlled using a UNIX-style real-time operating system. Facets of the implementation will be discussed, including the reengineering of the interfaces in OS/9 C to allow connection to the existing interinstrument communications systems (Utility Network). The algorithms needed to successfully configure 160 fibers taking into account prime focus corrector (PFC) distortions are also discussed. The second part of this paper describes the astronomer-level control system running on the VAX System Computer. Details will be given of the way in which the astronomer's target field is defined and converted into the configuration data to be sent to the microprocessor system, including the mapping of the PFC distortions and the acquisition of new target fields.

Paper Details

Date Published: 1 June 1994
PDF: 8 pages
Proc. SPIE 2198, Instrumentation in Astronomy VIII, (1 June 1994); doi: 10.1117/12.176789
Show Author Affiliations
Ian J. Lewis, Univ. of Durham (United Kingdom)
Lewis R. Jones, Royal Greenwich Observatory (United Kingdom)
Ian Robert Parry, Anglo-Australian Observatory (United Kingdom)

Published in SPIE Proceedings Vol. 2198:
Instrumentation in Astronomy VIII
David L. Crawford; Eric R. Craine, Editor(s)

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