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Proceedings Paper

The preliminary design of the G-CLEF spectrograph instrument device control system
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Paper Abstract

The Giant Magellan Telescope (GMT)-Consortium Large Earth Finder (G-CLEF) is a fiber-fed, precision radial velocity optical echelle spectrograph. The preliminary software design incorporates a hierarchical, multi-level state machine. At the lowest level, the state machine utilizes GMT-provided frameworks to communicate with the hardware. At higher levels of abstraction, the design makes extensive use of State Chart Extensible Markup Language (SCXML) representations to define the operation of the instrument. The functionality of the design can be validated by executing these representations. The incorporation of an interpreter to directly execute the SCXML as a component of the control system is being investigated. The approaches used to develop the preliminary software design concept are described, the use and utility of SCXML for instrument control is discussed, and the application of the preliminary design to a subset of G-CLEF subsystems is demonstrated.

Paper Details

Date Published: 6 July 2018
PDF: 14 pages
Proc. SPIE 10707, Software and Cyberinfrastructure for Astronomy V, 107071F (6 July 2018); doi: 10.1117/12.2312242
Show Author Affiliations
Ian N. Evans, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Daniel Durusky, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Janet DePonte Evans, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Thomas Gauron, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Cem Onyuksel, Harvard-Smithsonian Ctr. for Astrophysics (United States)
David A. Plummer, Harvard-Smithsonian Ctr. for Astrophysics (United States)


Published in SPIE Proceedings Vol. 10707:
Software and Cyberinfrastructure for Astronomy V
Juan C. Guzman; Jorge Ibsen, Editor(s)

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