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Proceedings Paper

Application of SQL database to the control system of MOIRCS
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Paper Abstract

MOIRCS (Multi-Object Infrared Camera and Spectrograph) is a new instrument for the Subaru telescope. In order to perform observations of near-infrared imaging and spectroscopy with cold slit mask, MOIRCS contains many device components, which are distributed on an Ethernet LAN. Two PCs wired to the focal plane array electronics operate two HAWAII2 detectors, respectively, and other two PCs are used for integrated control and quick data reduction, respectively. Though most of the devices (e.g., filter and grism turrets, slit exchange mechanism for spectroscopy) are controlled via RS232C interface, they are accessible from TCP/IP connection using TCP/IP to RS232C converters. Moreover, other devices are also connected to the Ethernet LAN. This network distributed structure provides flexibility of hardware configuration. We have constructed an integrated control system for such network distributed hardwares, named T-LECS (Tohoku University - Layered Electronic Control System). T-LECS has also network distributed software design, applying TCP/IP socket communication to interprocess communication. In order to help the communication between the device interfaces and the user interfaces, we defined three layers in T-LECS; an external layer for user interface applications, an internal layer for device interface applications, and a communication layer, which connects two layers above. In the communication layer, we store the data of the system to an SQL database server; they are status data, FITS header data, and also meta data such as device configuration data and FITS configuration data. We present our software system design and the database schema to manage observations of MOIRCS with Subaru.

Paper Details

Date Published: 27 June 2006
PDF: 12 pages
Proc. SPIE 6274, Advanced Software and Control for Astronomy, 62740Y (27 June 2006); doi: 10.1117/12.670957
Show Author Affiliations
Tomohiro Yoshikawa, Tohoku Univ. (Japan)
Subaru Telescope (United States)
Koji Omata, Subaru Telescope (United States)
Masahiro Konishi, Tohoku Univ. (Japan)
Subaru Telescope (United States)
Takashi Ichikawa, Tohoku Univ. (Japan)
Ryuji Suzuki, Tohoku Univ. (Japan)
Subaru Telescope (United States)
Chihiro Tokoku, Tohoku Univ. (Japan)
Subaru Telescope (United States)
Yuka Katsuno Uchimoto, Tohoku Univ. (Japan)
Subaru Telescope (United States)
Univ. of Tokyo (Japan)
Tetsuo Nishimura, Subaru Telescope (United States)

Published in SPIE Proceedings Vol. 6274:
Advanced Software and Control for Astronomy
Hilton Lewis; Alan Bridger, Editor(s)

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