225 GHz Atmospheric Opacity Measurements from Two Arctic Sites

We report the latest results of 225 GHz atmospheric opacity measurements from two Arctic sites; one on high coastal terrain near the Eureka weather station, on Ellesmere Island, Canada, and the other at the Summit Station near the peak of the Greenland icecap. This is a campaign to search for a site...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2012-08, Vol.8 (S288), p.204-207
Main Authors: Matsushita, S., Chen, Ming-Tang, Martin-Cocher, P., Asada, K., Chen, C.-P., Inoue, M., Paine, S., Turner, D., Steinbring, E.
Format: Article
Language:English
Subjects:
Astronomy
Atmospheric sciences
Contributed Papers
Observatories
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Summary:We report the latest results of 225 GHz atmospheric opacity measurements from two Arctic sites; one on high coastal terrain near the Eureka weather station, on Ellesmere Island, Canada, and the other at the Summit Station near the peak of the Greenland icecap. This is a campaign to search for a site to deploy a new telescope for submillimeter Very Long Baseline Interferometry and THz astronomy in the northern hemisphere. Since 2011, we have obtained 3 months of winter data near Eureka, and about one year of data at Summit Station. The results indicate that these sites offer a highly transparent atmosphere for observations in submillimeter wavelengths. Summit Station is particularly excellent, and its zenith opacity at 225 GHz is statistically similar to the Atacama Large Milllimeter/submillimeter Array site in Chile. In winter, the opacity at Summit Station is even comparable to that observed at the South Pole.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921312016882