Korean VLBI Network (KVN)

Antenna Pointing accuracy

A sample of late type stars has been used continuously to improve the pointing accuracy of the telescope during 2009-2012. The following table describes the accuracies of pointing models established for three KVN radio telescopes in 2012. The root mean square (rms) of the residual pointing offsets between the observations and the pointing models are listed in total, azimuth, and elevation, respectively, for each epoch and telescope.

Site Total (arcsec) Azimuth (arcsec) Elevation (arcsec) Measured Freq. Measured Date
KVNYS 4.3 2.7 3.3 43 GHz 2012
KVNUS 4.4 2.5 3.6 43 GHz 2012
KVNTN 5.6 2.7 4.9 43 GHz 2012

In case of observations during a daytime, especially at sunrise and sunset, the pointing observations must be conducted out at least every hour for maintaining the pointing accuracy to be less than 5 arcseconds in rms.


The residual of pointing model measured at KVNYS.


The residual of pointing model measured at KVNUS.


The residual of pointing model measured at KVNTN.

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Korean VLBI Network