Control and monitoring software for the Greenland Telescope

Chih Wei Locutus Huang*, Satoki Matsushita, Nimesh A. Patel, Ranjani Srinivasan, Keiichi Asada, Geoffrey Bower, Shu Hao Chang, Chung Cheng Chen, Ming Tang Chen, Ryan Chilson, Chih Chiang Han, Paul T.P. Ho, Yau De Huang, Makoto Inoue, Homin Jiang, Jun Yi Koay, Patrick M. Koch, Shoko Koyama, Derek Y. Kubo, Cheng Yu KuoChao Te Li, Ching Tang Liu, Kuan Yu Liu, Wen Ping Lo, Pierre Martin-Cocher, Masanori Nakamura, Timothy J. Norton, George Nystrom, Peter Oshiro, Jongho Park, Hung Yi Pu, Philippe Raffin, Ramprasad Rao, Cristina Romero-Cañizales, Paul Shaw, T. K. Sridharan, Ta Shun Wei, Chen Yu Yu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We describe the latest development of the control and monitoring system of the Greenland Telescope (GLT). The GLT is a 12-m radio telescope aiming to carry out the sub-millimeter Very Long Baseline Interferometry (VLBI) observations through the Event Horizon Telescope (EHT) and the Global Millimeter VLBI Array (GMVA), to image the shadows of super massive black holes. The telescope is currently located at the Thule Air Base for commissioning before deployed to the Summit Station. The GLT participated in the VLBI observing campaigns in 2018 and 2019 and fringes were successfully detected at 86 and 230 GHz. Our antenna control software was adapted from the Submillimeter Array (SMA), and as a result for single-dish observations we added new routines to coordinate it with other instruments. We are exploring new communication interfaces; we utilized both in-memory and on-disk databases to be part of the interfaces not only for hardware monitoring but also for engineering event logging. We plan to incorporate the system of the James Clerk Maxwell Telescope for the full Linux-based receiver control. The current progress of integrating our receivers, spectrometers, sub-reflector, and continuum detector into control is presented, together with the implementation of the commissioning software for spectral line pointing. We also describe how we built the anti-collision protection and the recovery mechanism for the sub-reflector hexapod.

Original languageEnglish
Title of host publicationSoftware and Cyberinfrastructure for Astronomy VI
EditorsJuan C. Guzman, Jorge Ibsen
PublisherSPIE
ISBN (Electronic)9781510636910
DOIs
Publication statusPublished - 2020
EventSoftware and Cyberinfrastructure for Astronomy VI 2020 - Virtual, Online, United States
Duration: 2020 Dec 142020 Dec 18

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11452
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceSoftware and Cyberinfrastructure for Astronomy VI 2020
Country/TerritoryUnited States
CityVirtual, Online
Period2020/12/142020/12/18

Keywords

  • Radio telescope
  • VLBI
  • control software
  • network

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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