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Proceedings Paper

Overview of the control system for the Keck interferometer
Author(s): Andrew J. Booth; Glenn Eychaner; Erik Hovland; Richard L. Johnson Jr.; William Lupton; Al Niessner; Dean L. Palmer; Leonard J. Reder; Andy C. Rudeen; Robert F. Smythe; Kevin Tsubota
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Paper Abstract

The Keck Interferometer links the two 10m Keck Telescopes located atop Mauna Kea in Hawaii. It is the first 10m class, fully AO equipped interferometer to enter operation. Further, it is the first large interferometer designed to be handed over from a design and implementation team to a separate operations team, and be used by astronomers who are not interferometer specialists. As such it offers unique challenges in reducing an extremely complex and powerful system to an apparently simple user interface, and providing a well engineered system that can be maintained by people who did not develop it. This paper gives an overview of the control system that has been implemented for the single baseline operation of the instrument, and indicates how this will be extended to allow control of the future modes of the instrument (nulling, differential phase and astrometry). The control system has several parts. One is for control of "slow" sub-systems, which is based in the EPICS architecture, already ubiquitous at the Keck Observatory. Another, used to control hard real time sub-systems, is based on a new infrastructure developed at JPL, programmed in C++, Java, and using CORBA for communication. This infrastructure has been developed specifically with the problems of interferometric control in mind and is used in JPL's flight testbeds as well as the Keck Interferometer. Finally, a user interface and high level control layer is in development using a variety of tools including UML based modeling in the Rhapsody tool (using C++ and CORBA), Java, and Tcl/Tk for prototyping.

Paper Details

Date Published: 13 December 2002
PDF: 9 pages
Proc. SPIE 4848, Advanced Telescope and Instrumentation Control Software II, (13 December 2002); doi: 10.1117/12.461555
Show Author Affiliations
Andrew J. Booth, Jet Propulsion Lab. (United States)
Glenn Eychaner, Jet Propulsion Lab. (United States)
Erik Hovland, Jet Propulsion Lab. (United States)
Richard L. Johnson Jr., Jet Propulsion Lab. (United States)
William Lupton, W.M. Keck Observatory (United States)
Al Niessner, Jet Propulsion Lab. (United States)
Dean L. Palmer, Jet Propulsion Lab. (United States)
Leonard J. Reder, Jet Propulsion Lab. (United States)
Andy C. Rudeen, W.M. Keck Observatory (United States)
Robert F. Smythe, Jet Propulsion Lab. (United States)
Kevin Tsubota, W. M. Keck Observatory (United States)

Published in SPIE Proceedings Vol. 4848:
Advanced Telescope and Instrumentation Control Software II
Hilton Lewis, Editor(s)

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