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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20100203T000000
DTEND;TZID=Atlantic/Canary:20100203T010000
UID:iactalks-170
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/170
CREATED:2010-02-03T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Precipitable water vapour at the Roque de los Muchachos Observatory
  from GPS measurements
DESCRIPTION:Precipitable water vapour at the Roque de los Muchachos Observa
 tory from GPS measurements\nDr. Ignacio Romero Trujillo, Dr. Begoña GarcÃ
 ­a Lorenzo\n\nThere are many parameters accounting for the quality of an a
 stronomical site, namely seeing, cloud cover, ground winds, high-altitude 
 winds, etc. The water vapor content is the main parameter affecting the IR
  quality of astronomical sites. The fraction of nights with good IR condit
 ions (small column of water vapor) as a function of the epoch of the year 
 will allow an optimal scheduling of telescope observing time. Global Posit
 ioning System (GPS) is an increasingly operational tool for measuring the 
 precipitable water vapor (PWV). In this seminar, we briefly describe the p
 rocedure to estimate the PWV through GPS and we present the statistical re
 sults derived from a 7.5-year long time series of PWV estimations derived 
 from GPS at the Roque de los Muchachos Observatory.
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