We introduce and describe performance of the 6-meter telescope of Seoul Radio Astronomy Observatory (SRAO). All the softwares and instruments except the antenna structure and its driving system are developed for ourselves. The SIS mixer type receiver resulted in the receiver noise temperature less than 50 K (DSB) over the whole 3-mm radio window. An autocorrelation spectrometer, developed first in Korea, provides maximum 50 MHz band width over 1024 channels. Antenna surface is measured and adjusted using template method and radio holography which resulted in a superb surface accuracy bet-ter than 30μm. Accordingly, the aperture and beam efficiences amount to 70% and 75%, respectively, largely independent of frequency in the 85 - 115 GHz range. It is also found that telescope pointing errors are less than 10" in both azimuth and elevation and that antenna gain is almost constant against elevation greater than 20°, without adjusting sub-reflector position. The SRAO 6-meter telescope is now fully operational and all these characteristics verify that observations are carried out with high precision and fidelity.

• BON-CHUL KOO(Astronomy Program, SEES, Seoul National University)
• YONG-SUN PARK(Astronomy Program, SEES, Seoul National University)
• SEUNG SOO HONG(Astronomy Program, SEES, Seoul National University)
• HONG-SIK YUN(Astronomy Program, SEES, Seoul National University)
• SANG-GAK LEE(Astronomy Program, SEES, Seoul National University)
• DO-YOUNG BYUN(Astronomy Program, SEES, Seoul National University)
• JUNG-WON LEE(Astronomy Program, SEES, Seoul National University)
• HAN-KyU CHOI(Astronomy Program, SEES, Seoul National University)
• SANG-SUNG LEE(Astronomy Program, SEES, Seoul National University)
• YOUNG-ZOO YOON(Astronomy Program, SEES, Seoul National University)
• KEE-TAE KIM(Astronomy Program, SEES, Seoul National University)
• HYUN WOO KANG(Astronomy Program, SEES, Seoul National University)
• JUNG-EuN LEE(Astronomy Program, SEES, Seoul National University)