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Proceedings Paper

Integration of SCUBA-2 within the JCMT Observatory Control System
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Paper Abstract

The high data rates and unique operation modes of the SCUBA-2 instrument made for an especially challenging effort to get it working with the existing JCMT Observatory Control System (OCS). Due to some forethought by the original designers of the OCS, who had envisioned a SCUBA-2 like instrument years before it was reality, the JCMT was already being coordinated by a versatile Real Time Sequencer (RTS). The timing pulses from the RTS are fanned out to all of the SCUBA-2 Multi Channel Electronics (MCE) boxes allowing for precision timing of each data sample. The SCUBA-2 data handing and OCS communications are broken into two tasks, one doing the actual data acquisition and file writing, the other communicates with the OCS through Drama. These two tasks talk to each other via shared memory and semaphores. It is possible to swap back and forth between heterodyne and SCUBA-2 observing simply by selecting an observation for a particular instrument. This paper also covers the changes made to the existing OCS in order to integrate it with the new SCUBA-2 specific software.

Paper Details

Date Published: 19 July 2010
PDF: 8 pages
Proc. SPIE 7740, Software and Cyberinfrastructure for Astronomy, 77400Y (19 July 2010); doi: 10.1117/12.857879
Show Author Affiliations
Craig A. Walther, Joint Astronomy Ctr. (United States)
Xiaofeng Gao, UK Astronomy Technology Ctr. (United Kingdom)
Dennis Kelly, UK Astronomy Technology Ctr. (United Kingdom)
Russell D. Kackley, Joint Astronomy Ctr. (United States)
Tim Jenness, Joint Astronomy Ctr. (United States)

Published in SPIE Proceedings Vol. 7740:
Software and Cyberinfrastructure for Astronomy
Nicole M. Radziwill; Alan Bridger, Editor(s)

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