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SUMMARY:Water Vapour Radiometry at ALMA: Properties of the Atmosphere and 
 First Tests of Phase Correction - Bojan Nikolic &amp\; Rosie Bolton (Caven
 dish Astrophysics)
DTSTART:20110308T163000Z
DTEND:20110308T173000Z
UID:TALK29614@talks.cam.ac.uk
CONTACT:David Titterington
DESCRIPTION:ALMA is now being commissioned at its 5000m-high\, extremely d
 ry\, site.  Currently there are nine antennas at the high site routinely m
 aking tests and observing science verifications targets.  In this talk we 
 will describe the initial results of water vapour radiometric phase correc
 tion which is a crucial component in the ALMA calibration plan.  We will d
 iscuss the hardware\, the algorithms developed here in Cambridge and\, usi
 ng the first year of test data from the site\, the effectiveness of the ov
 erall system.  We will also show results of measurement of the properties 
 of atmospheric turbulence based on the water vapour radiometer data.
LOCATION:Ryle Seminar Room\, Cavendish Laboratory
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