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Proceedings Paper

225GHz opacity measurements at Summit camp, Greenland, for the GreenLand Telescope (GLT) site testing
Author(s): Pierre L. Martin-Cocher; Keiichi Asada; Satoki Matsushita; Ming-Tang Chen; Paul T. P. Ho; Chien-Ping Chen
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Paper Abstract

We report three winter seasons and two full summer from August 2011 to April 2014 of atmospheric opacity measurements with a 225GHz tipping radiometer at Summit camp in Greenland (Latitude 72°.57 N, Longitude 38°.46 W, Elevation 3250 masl). The summit of the ice cap in Greenland is expected to be the location for the GreenLand Telescope (GLT), a 12 meters aperture millimeter / sub-millimeter telescope with VLBI and single- dish capability. The winter regime (November to April) is of particular interest for sub-millimeter observations since the opacities lower quartile in these months can get as low as 0.042, with occasional opacities as low as 0.025. We then compare Summit zenith opacities to other submillimeter sites.

Paper Details

Date Published: 8 July 2014
PDF: 8 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91473N (8 July 2014); doi: 10.1117/12.2056272
Show Author Affiliations
Pierre L. Martin-Cocher, Institute of Astronomy and Astrophysics, Academia Sinica (Taiwan)
Keiichi Asada, Institute of Astronomy and Astrophysics, Academia Sinica (Taiwan)
Satoki Matsushita, Institute of Astronomy and Astrophysics, Academia Sinica (Taiwan)
Ming-Tang Chen, Institute of Astronomy and Astrophysics, Academia Sinica (Taiwan)
Paul T. P. Ho, Institute of Astronomy and Astrophysics, Academia Sinica (Taiwan)
Harvard-Smithsonian Ctr. for Astrophysics (United States)
Chien-Ping Chen, Institute of Astronomy and Astrophysics, Academia Sinica (Taiwan)


Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)

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