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Water Vapour Radiometry at ALMA: Properties of the Atmosphere and First Tests of Phase Correction

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If you have a question about this talk, please contact David Titterington .

ALMA is now being commissioned at its 5000m-high, extremely dry, site. Currently there are nine antennas at the high site routinely making tests and observing science verifications targets. In this talk we will describe the initial results of water vapour radiometric phase correction which is a crucial component in the ALMA calibration plan. We will discuss the hardware, the algorithms developed here in Cambridge and, using the first year of test data from the site, the effectiveness of the overall system. We will also show results of measurement of the properties of atmospheric turbulence based on the water vapour radiometer data.

This talk is part of the Cavendish Astrophysics Seminars series.

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