Atmospheric Phase Correction Using Total Power Radiometry at the Submillimeter Array

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Atmospheric Phase Correction Using Total Power Radiometry at the Submillimeter Array

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Title: Atmospheric Phase Correction Using Total Power Radiometry at the Submillimeter Array
Author: Battat, James Benjamin Royston; Blundell, Raymond; Moran, James M.; Paine, Scott

Note: Order does not necessarily reflect citation order of authors.

Citation: Battat, James B., Raymond Blundell, James M. Moran, and Scott Paine. 2004. “Atmospheric Phase Correction Using Total Power Radiometry at the Submillimeter Array.” The Astrophysical Journal 616 (1) (October 28): L71–L74. doi:10.1086/423932.
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Abstract: Phase noise caused by an inhomogeneous, time-variable water vapor distribution in our atmosphere reduces the angular resolution, visibility amplitude and coherence time of millimeter and submillimeter wavelength interferometers. We present early results from our total power radiometry phase correction experiment carried out with the Submillimeter Array on Mauna Kea. From accurate measurements of the atmospheric emission along the lines of sight of two elements of the array, we estimated the differential atmospheric electrical path between them. In one test, presented here, the phase correction technique reduced the rms phase noise at 230 GHz from 72◦ to 27◦ over a 20 minute period with a 2.5 second integration time. This corresponds to a residual differential electrical path of 98 µm, or 15 µm of precipitable water vapor, and raises the coherence in the 20 minute period from 0.45 to 0.9.
Published Version: 10.1086/423932
Other Sources: http://arxiv.org/abs/astro-ph/0407142
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:32094554
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