The characteristic of VLBI in Korea
Various electromagnetic waves are received by antenna (diameter = 22m). We collect specific information form the waves.
VLBI antenna of SGOC has high driving speed. With its outstanding driving speed, we can observe a large number of quasars.
- driving speed : AZ 5˚/sec, AL 5˚/sec
- range of driving : AZ ±270˚, AL 0˚ ~ 90˚
VLBI system of SGOC is available for observation in four different frequency bands at the same time. 2GHz, 8GHz bands for international measurement and
22GHz, 43GHz bands for domestic measurement.
- Geodetic VLBI : 2, 8GHz
- VLBI (with *KASI): 28, 43GHz
(＊Korea Astronomy and Space Science Institute)
The arrival time of quasar’s electromagnetic wave is measured by the atomic clock. The error of atomic clock is 1sec per 1million years.