The Greenland Telescope (GLT): Antenna status and future plans

Philippe Raffin*, Juan Carlos Algaba-Marcosa, Keiichi Asada, Raymond Blundell, Roberto Burgos, Chih Cheng Chang, Ming Tang Chen, Robert Christensen, Paul K. Grimes, C. C. Han, Paul T.P. Ho, Yau De Huang, Makoto Inoue, Patrick M. Koch, Derek Kubo, Steve Leiker, Ching Tang Liu, Pierre Martin-Cocher, Satoki Matsushita, Masanori NakamuraHiroaki Nishioka, George Nystrom, Scott N. Paine, Nimesh A. Patel, Nicolas Pradel, Hung Yi Pu, H. Y. Shen, William Snow, Tirupati K. Sridharan, Ranjani Srinivasan, Edward Tong, Jackie Wang

*此作品的通信作者

研究成果: 書貢獻/報告類型會議論文篇章

7 引文 斯高帕斯(Scopus)

摘要

The ALMA North America Prototype Antenna was awarded to the Smithsonian Astrophysical Observatory (SAO) in 2011. SAO and the Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), SAO's main partner for this project, are working jointly to relocate the antenna to Greenland to carry out millimeter and submillimeter VLBI observations. This paper presents the work carried out on upgrading the antenna to enable operation in the Arctic climate by the GLT Team to make this challenging project possible, with an emphasis on the unexpected telescope components that had to be either redesigned or changed. Five-years of inactivity, with the antenna laying idle in the desert of New Mexico, coupled with the extreme weather conditions of the selected site in Greenland have it necessary to significantly refurbish the antenna. We found that many components did need to be replaced, such as the antenna support cone, the azimuth bearing, the carbon fiber quadrupod, the hexapod, the HVAC, the tiltmeters, the antenna electronic enclosures housing servo and other drive components, and the cables. We selected Vertex, the original antenna manufacturer, for the main design work, which is in progress. The next coming months will see the major antenna components and subsystems shipped to a site of the US East Coast for test-fitting the major antenna components, which have been retrofitted. The following step will be to ship the components to Greenland to carry out VLBI and single dish observations. Antenna reassembly at Summit Station should take place during the summer of 2018.

原文英語
主出版物標題Ground-Based and Airborne Telescopes V
編輯Helen J. Hall, Larry M. Stepp, Roberto Gilmozzi
發行者SPIE
ISBN(電子)9780819496133
DOIs
出版狀態已發佈 - 2014
對外發佈
事件Ground-Based and Airborne Telescopes V - Montreal, 加拿大
持續時間: 2014 6月 222014 6月 27

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
9145
ISSN(列印)0277-786X
ISSN(電子)1996-756X

會議

會議Ground-Based and Airborne Telescopes V
國家/地區加拿大
城市Montreal
期間2014/06/222014/06/27

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 電腦科學應用
  • 應用數學
  • 電氣與電子工程

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