Measurement of Submillimeter Zenith Opacity at 492 GHz

Details Measurement of Submillimeter Zenith Opacity at 492 GHz Measurement of Submillimeter Zenith Opacity at 492 GHz

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004acasn..45...79y&link_type=abstract

Acta Astronomica Sinica, vol. 45, no. 1, p. 79-87

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Submillimeter, Atmospheric Effects, Site Testing

Scientific paper

Zenith opacity at 492GHz submillimeter wave-band is measured using the Portable Submillimeter Telescope (POST) at the Delingha site of Purple Mountain Observatory at an altitude of 3200,m. In total, 25842 datasets are obtained over 1999-2000 and 2000-2001 winter seasons, covering 870 hours of observing time. Statistics shows that the data of zenith opacity are mainly distributed between 1.3-3.0, with 3 percent or less of time to have ?0 ?1.0. The data distribution of zenith opacities over the existing submillimeter observing sites are compared based on the observations.

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