• The Bulletin of The Korean Astronomical Society
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• v.25 no.1
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• pp.38-38
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• 2000

• The Bulletin of The Korean Astronomical Society
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• v.33 no.2
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• pp.38.1-38.1
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• 2008

• Bulletin of the Korean Space Science Society
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• 2005.10a
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• pp.70-70
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• 2005

• Bulletin of the Korean Space Science Society
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• 2005.10a
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• pp.60-60
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• 2005

• Bulletin of the Korean Space Science Society
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• 2009.04a
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• pp.45.2-45.2
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• 2009

• Journal of The Korean Astronomical Society
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• v.44 no.3
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• pp.81-87
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• 2011

We carry out 100-GHz band test observations with the newly-constructed KVN 21-m radio telescopes in order to evaluate their performance. The three telescopes have similar performance parameters. The pointing accuracies are about 4" rms for the entire sky. The main beam sizes are about 30" (FWHMs), which is nearly the diffraction limit of the telescopes at the observing frequency (97 GHz). The measured aperture and main-beam efficiencies are about 52% and 46%, respectively, for all three telescopes. The estimated moon efficiency is ~84% for the KVN Tamna telescope. The first sidelobes appear 50" (~1.6${\times}$FWHM) from the main beam centers and the levels are on average -14 dB.

• Bulletin of the Korean Space Science Society
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• 2005.10a
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• pp.41-41
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• 2005

• Bulletin of the Korean Space Science Society
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• 2005.10a
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• pp.59-59
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• 2005

• Bulletin of the Korean Space Science Society
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• 2001.11a
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• pp.17-17
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• 2001

• Journal of Astronomy and Space Sciences
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• v.25 no.1
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• pp.43-52
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• 2008

As the next generation of global satellite navigation system, the Galileo project is about to witness an initial orbit validation stage as the successful test of navigation message transmission from Giove-A in 2007. The Space Geodesy division ana the Radio Astronomy division of the Korea Astronomy & Space Science Institute had collaborated on the field survey for the Galileo Sensor Station (GSS) RF environment of the proposed site near Jeju Tamla University from August 3rd to August 5th, 2006. The power spectrums were measured in full-band $(800{\sim}2000MHz)$ and in-band (E5, E6 and L1 band) in frequency domain for 24 hours respectively. Finally, we performed a time domain analysis to characterize strong in-band interference source based on the result of the previous step.