Computer Science – Performance
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jkas...36...43k&link_type=abstract
Journal of the Korean Astronomical Society, vol. 36, no. 1, pp. 43-48
Computer Science
Performance
7
Instruments:Radio Telescope
Scientific paper
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 better 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 20o, 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.
Byun Do-Young
Choi Han-Kyu
Hong Seung Soo
Kang Hyun Woo
Kim Kee-Tae
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