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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 33, Iss. 6 — Feb. 20, 1994
  • pp: 1095–1099

225-GHz atmospheric opacity of the South Pole sky derived from continual radiometric measurements of the sky-brightness temperature

Richard A. Chamberlin and John Bally  »View Author Affiliations


Applied Optics, Vol. 33, Issue 6, pp. 1095-1099 (1994)
http://dx.doi.org/10.1364/AO.33.001095


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Abstract

We report measurements of the atmospheric opacity of the South Pole at 225 GHz for the period from day 3 to day 180 in 1992. These opacity data were derived from continual radiometric measurements of the sky-brightness temperature as a function of the zenith angle. These radiometric measurements were performed with a 225-GHz heterodyne atmospheric radiometer on loan from the National Radio Astronomy Observatory. This radiometer was previously used to characterize other candidate millimeter and submillimeter radio-telescope sites. We found that the atmospheric opacity was below 0.098 air mass−1 75% of the time from day 3 to day 70 in 1992, and below 0.055 air mass−1 75% of the time from day 70 to day 180 in 1992. Thus, our data demonstrate that the South Pole is an excellent site for performing millimeter- and submillimeter-wavelength radio astronomy.

© 1994 Optical Society of America

History
Original Manuscript: November 9, 1992
Revised Manuscript: August 25, 1993
Published: February 20, 1994

Citation
Richard A. Chamberlin and John Bally, "225-GHz atmospheric opacity of the South Pole sky derived from continual radiometric measurements of the sky-brightness temperature," Appl. Opt. 33, 1095-1099 (1994)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-33-6-1095


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References

  1. M. Dragovan, A. A. Stark, R. Pernic, M. A. Pomerantz, “Millimetric sky-opacity measurements from the South Pole,” Appl. Opt. 29, 463–466 (1990). [CrossRef] [PubMed]
  2. W. D. Smythe, B. V. Jackson, “Atmospheric water vapor at the South Pole,” Appl. Opt. 16, 2041–2042 (1977). [CrossRef] [PubMed]
  3. D. E. Hogg, “A summary of the data obtained during the mmA site survey,” Millimeter Array Memo 79 (National Radio Astronomy Observatory, Socorro, New Mexico, 1992).
  4. Zhong-Yi Liu, 225-GHz Atmospheric Receiver—User's Manual, Electronics Division Internal Rep. 271 (National Radio Astronomy Observatory, Socorro, New Mexico, 1987).
  5. M. McKinnon, Measurement of Atmospheric Opacity Due to Water Vapor at 225 GHz, Millimeter Array Memo 40, (National Radio Astronomy Observatory, Socorro, New Mexico, 1987).
  6. K. Rohlfs, Tools of Radio Astronomy (Springer-Verlag, Berlin, 1986) pp. 166–167.
  7. H. J. Liebe, “MPM—an atmospheric millimeter-wave propagation model,” Int. J. Infrared Millimeter Waves 10, 631–650 (1989). [CrossRef]

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