Seeing Test at Samorkraeng Mountain
Abstract
Seeing test based on DIMM method was employed to investigate the atmospheric
turbulence at Samorkraeng Mountain, Wangtong district, Phitsanulok province. The latitude
and the longitude of the selected site for an observatory are 16???50???.59 N and 100???24???.08 E,
respectively; the altitude is about 180 meters above the sea level; and the distance is about 15
kilometers north east from the downtown of Phitsanulok.
The statistics of the seeing in FWHM, temperature, and humidity which measured
and calculated for 20 nights during December 8, 2004 to January 4, 2006 are as follows:
maximum FWHM, minimum FWHM, and average FWHM are 3.6, 0.8, and 1.7 arc seconds,
respectively; maximum temperature, minimum temperature, and average temperature are
29.2, 17.4, and 22.8 ??C, respectively; and maximum humidity, minimum humidity, average
humidity are 80, 55, and 68.8 percent, respectively. The average seeing value at
Samorkraeng Mountain is not much different from the average values at Siding Springs in
Australia, Kitt Peak in the United States of America, Devasthal in India, and South Pole in
Antarctica which are the famous observatories in the world.
turbulence at Samorkraeng Mountain, Wangtong district, Phitsanulok province. The latitude
and the longitude of the selected site for an observatory are 16???50???.59 N and 100???24???.08 E,
respectively; the altitude is about 180 meters above the sea level; and the distance is about 15
kilometers north east from the downtown of Phitsanulok.
The statistics of the seeing in FWHM, temperature, and humidity which measured
and calculated for 20 nights during December 8, 2004 to January 4, 2006 are as follows:
maximum FWHM, minimum FWHM, and average FWHM are 3.6, 0.8, and 1.7 arc seconds,
respectively; maximum temperature, minimum temperature, and average temperature are
29.2, 17.4, and 22.8 ??C, respectively; and maximum humidity, minimum humidity, average
humidity are 80, 55, and 68.8 percent, respectively. The average seeing value at
Samorkraeng Mountain is not much different from the average values at Siding Springs in
Australia, Kitt Peak in the United States of America, Devasthal in India, and South Pole in
Antarctica which are the famous observatories in the world.
Keywords: Site testing-seeing, Astronomical seeing, Atmospheric effects, Seeing disk, DIMM