Commissioning status of the Greenland Telescope (GLT)

Satoki Matsushita; Keiichi Asada; Makoto Inoue; Hiroaki Nishioka; Chih-Wei L. Huang; Nimesh A. Patel; Jun Yi Koay; Shoko Koyama; Patrick Koch; Zheng Meyer-Zhao; Lupin C.-C. Lin; Paul T. P. Ho; Ming-Tang Chen; Timothy J. Norton; Kuan-Yu Liu; Chen-Yu Yu; Do-Young Byun; Juan-Carlos Algaba Marcos; Alex Allardi; Geoffrey C. Bower; Shu-Hao Chang; Chung-Chen Chen; Ryan Chilson; Aaron Faber; Chih-Chiang Han; Yau-De Huang; Homin Jiang; Derek Kubo; Ching-Tang Liu; Wen-Ping Lo; Pierre Martin-Cocher; Masanori Nakamura; George Nystrom; Peter Oshiro; Hung-Yi Pu; Philippe Raffin; Paul Shaw; Williams Snow; Ranjani Srinivasan; Ta-Shun Wei; Ryan Berthold; Daniel Bintley; Jessica Dempsey; Per Friberg; Craig Walther; Jonathan Weintroub; André Young; Ken Young; T. K. Sridharan; Sheperd S. Doeleman; Roger Brissenden; Hideo Ogawa; Kimihiro Kimura; Yutaka Hasegawa; Jinchi Hao; Kou-Chang Han; Song-Chu Chang; Li-Ming Lu

doi:10.1117/12.2310046

6 July 2018 Commissioning status of the Greenland Telescope (GLT)

Satoki Matsushita, Keiichi Asada, Makoto Inoue, Hiroaki Nishioka, Chih-Wei L. Huang, Nimesh A. Patel, Jun Yi Koay, Shoko Koyama, Patrick Koch, Zheng Meyer-Zhao, Lupin C.-C. Lin, Paul T. P. Ho, Ming-Tang Chen, Timothy J. Norton, Kuan-Yu Liu, Chen-Yu Yu, Do-Young Byun, Juan-Carlos Algaba Marcos, Alex Allardi, Geoffrey C. Bower, Shu-Hao Chang, Chung-Chen Chen, Ryan Chilson, Aaron Faber, Chih-Chiang Han, Yau-De Huang, Homin Jiang, Derek Kubo, Ching-Tang Liu, Wen-Ping Lo, Pierre Martin-Cocher, Masanori Nakamura, George Nystrom, Peter Oshiro, Hung-Yi Pu, Philippe Raffin, Paul Shaw, Williams Snow, Ranjani Srinivasan, Ta-Shun Wei, Ryan Berthold, Daniel Bintley, Jessica Dempsey, Per Friberg, Craig Walther, Jonathan Weintroub, André Young, Ken Young, T. K. Sridharan, Sheperd S. Doeleman, Roger Brissenden, Hideo Ogawa, Kimihiro Kimura, Yutaka Hasegawa, Jinchi Hao, Kou-Chang Han, Song-Chu Chang, Li-Ming Lu

Author Affiliations +

Proceedings Volume 10700, Ground-based and Airborne Telescopes VII; 1070029 (2018) https://doi.org/10.1117/12.2310046
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

The Greenland Telescope completed its construction, so the commissioning phase has been started since December 2017. Single-dish commissioning has started from the optical pointing which produced the first pointing model, followed by the radio pointing and focusing using the Moon for both the 86 GHz and the 230 GHz receivers. After Venus started to rise from the horizon, the focus positions has been improved for both receivers. Once we started the line pointing using the SiO(2-1) maser line and the CO(2-1) line for the 86 GHz and the 230 GHz receivers, respectively, the pointing accuracy also improved, and the final pointing accuracy turned to be around 3" - 5" for both receivers. In parallel, VLBI commissioning has been performed, with checking the frequency accuracy and the phase stability for all the components that would be used for the VLBI observations. After all the checks, we successfully joined the dress rehearsals and actual observations of the 86 GHz and 230 GHz VLBI observations, The first dress rehearsal data between GLT and ALMA were correlated, and successfully detected the first fringe, which confirmed that the GLT commissioning was successfully performed.

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Satoki Matsushita, Keiichi Asada, Makoto Inoue, Hiroaki Nishioka, Chih-Wei L. Huang, Nimesh A. Patel, Jun Yi Koay, Shoko Koyama, Patrick Koch, Zheng Meyer-Zhao, Lupin C.-C. Lin, Paul T. P. Ho, Ming-Tang Chen, Timothy J. Norton, Kuan-Yu Liu, Chen-Yu Yu, Do-Young Byun, Juan-Carlos Algaba Marcos, Alex Allardi, Geoffrey C. Bower, Shu-Hao Chang, Chung-Chen Chen, Ryan Chilson, Aaron Faber, Chih-Chiang Han, Yau-De Huang, Homin Jiang, Derek Kubo, Ching-Tang Liu, Wen-Ping Lo, Pierre Martin-Cocher, Masanori Nakamura, George Nystrom, Peter Oshiro, Hung-Yi Pu, Philippe Raffin, Paul Shaw, Williams Snow, Ranjani Srinivasan, Ta-Shun Wei, Ryan Berthold, Daniel Bintley, Jessica Dempsey, Per Friberg, Craig Walther, Jonathan Weintroub, André Young, Ken Young, T. K. Sridharan, Sheperd S. Doeleman, Roger Brissenden, Hideo Ogawa, Kimihiro Kimura, Yutaka Hasegawa, Jinchi Hao, Kou-Chang Han, Song-Chu Chang, and Li-Ming Lu "Commissioning status of the Greenland Telescope (GLT)", Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 1070029 (6 July 2018); https://doi.org/10.1117/12.2310046

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