[ ESO ]

Atacama Large Millimeter Array

Radio Seeing Data

To measure the tropospheric phase stability (Radio Seeing) at Llano de Chajnantor, ESO has installed an interferometer consisting of two 1.8 m offset feed antennas in a 300 m East-West baseline. This interferometer observes an unmodulated beacon at 11.198 GHz, broadcasted from a geostationary satellite, and measures the phase difference between the signals received by the two antennas.

[ West antennas ]

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A technical description and scientific rationale of the 12 GHz Interferometer (radio seeing monitor), has been published by Radford, Reiland, & Shillue 1996, PASP 108, 441

Data Available

 

m\y
1998
1999
2000
2001
2002
2003
2004
January
n/a
n/a
n/a
February
n/a
n/a
n/a
March
n/a
n/a
n/a
April
n/a
n/a
May
n/a
n/a
n/a
June
n/a
July
n/a
n/a
_
August
n/a
n/a
_
September
n/a
October
n/a
_
November
_
December
n/a
_
Total

 

 
For additional information please contact the ALMA Site Characterisation Team at almasct@eso.org
Last update: November 2004