초록(영문)
Most astronomical observation activities take place at a remote part of the city. As with this school, however,
for astronomical observatories located in urban areas, a different approach is considered to be necessary than would
normally be. Accordingly, we measured the atmospheric extinction coefficient, sky brightness, and seeing, which
are the measures that affect the astronomical observation environment. For this purpose, we conducted photometric
observation by altitude and azimuth of stars with similar magnitudes. The measured atmospheric extinction
coefficient was 0.m53, which is 0.m15~0.m20 bigger when compared with the astronomical observatory located in
the highlands. In the case of sky brightness, it was very bright in the west and north, which were greatly influenced
by light pollution of the city and the darkest side was the east. As expected, the smaller the ceiling distance
reduced the skylight considerably, and the shorter the wavelength the brighter the light field was observed at
the three RGB wavelengths. Seeing was measured at 5.87", 5.63", and 4.29" respectively in the RGB. The average
seeing value was judged to be worse observed in downtown areas, as the figure was similar to that measured
at Choejung-san, located in Daegu, during the winter season when the result was heavily affected by the wind.