225 GHz Atmospheric Opacity Measurements from Two Arctic Sites

Abstract 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 f...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union
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 in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 2012
Subjects:
Astronomy and Astrophysics
Space and Planetary Science
Arctic
Ellesmere Island
Canada
Greenland
South Pole
Eureka
Greenland Icecap
South pole
Online Access:http://dx.doi.org/10.1017/s1743921312016882
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1743921312016882
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Summary:Abstract 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.

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