Interferometric Phase Correction Using 183 GHZGHz Water Vapor Monitors

Details Interferometric Phase Correction Using 183 GHZGHz Water Vapor Monitors Interferometric Phase Correction Using 183 GHZGHz Water Vapor Monitors

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...553.1036w&link_type=abstract

The Astrophysical Journal, Volume 553, Issue 2, pp. 1036-1041.

Physics

Optics

19

Atmospheric Effects, Instrumentation: Adaptive Optics, Site Testing, Techniques: Interferometric

Scientific paper

The angular resolution that can be obtained by ground-based aperture synthesis telescopes at millimeter and submillimeter wavelengths is limited by phase fluctuations caused by water vapor in the Earth's atmosphere. We describe here the successful correction of such fluctuations during observations at 0.85 mm wavelength with an interferometer consisting of the James Clark Maxwell Telescope and the Caltech Submillimeter Observatory. This was achieved by using two 183 GHz heterodyne radiometers to measure the water vapor content along the line of sight of each telescope. Further development of such techniques will enable future telescopes, such as the Submillimeter Array and the Atacama Large Millimeter Array, to reach their full capability, providing a resolution of up to 0.01".

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