Mathematics – Logic
Scientific paper
Apr 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998rmxaa..34...47e&link_type=abstract
Revista Mexicana de Astronomia y Astrofisica, vol. 34, p. 47
Mathematics
Logic
26
Atmospheric Turbulence, Meteorological Parameters, Data Acquisition, Wind Direction, Telescopes, Subjects, Observatories, Humidity, Climatology, Atmospheric Effects
Scientific paper
Detailed measurements of the atmospheric turbulence and climatological conditions have been carried out at the site of the Observatorio Astronomico Nacional at San Pedro Mirtir. The results obtained during a three year period with the Site Testing Telescope from Steward Observatory yielded a median seeing of 0.61 arcsec and a first quartile of 0.50 arcsec. These were confirmed by independent and simultaneous measurements with the monitor of the Observatories of the Carnegie Institution. We detect a seasonal dependence on the seeing, with better results during spring and summer when we find a median of 0.59 arcsec, compared with autumn and winter, which have a median of 0.69 arcsec. Measurements with the Micro-Thermal Array show that the seeing decreases by 0.1 arcsec at a height of 15 meters. The seeing does not seem to depend strongly on meteorological variables like wind direction and velocity, humidity or external temperature.
Carr D. M.
Costero Rafael
Cromwell Richard H.
Echevarria J. J.
Harris O.
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