[asac] [almanews] ALMA Memo No. 334 Released

[Carolyn White]

ALMA Memo #334

Atmospheric Transparency at 225 GHz over Chajnantor, Mauna Kea, and the
South Pole

Simon J. E. Radford and Richard A. Chamberlin

November 10, 2000

Measurements of the 225\,GHz atmospheric transparency with functionally
identical tipping radiometers at Mauna Kea, the South Pole, and Chajnantor
indicate periods of excellent observing conditions at all three
sites. Conditions at Chajnantor and the South Pole are better than at
Mauna Kea. The first quartile zenith transparency at Chajnantor and the
South Pole are roughly equal. During the best conditions at Chajnantor,
however, the zenith transparency is better than during the best conditions
at the South Pole. Median conditions at Chajnantor and the South Pole are
similar for observations near meridian transit when observing geometry is
considered.

View a PDF version of ALMA Memo #334 at
   http://www.alma.nrao.edu/memos/html-memos/alma334/memo334.pdf

Download postscript version of ALMA Memo #334 from
   http://www.alma.nrao.edu/memos/html-memos/alma334/memo334.ps
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