천문학회보 (The Bulletin of The Korean Astronomical Society)

한국천문학회 (The Korean Astronomical Society)
권호 표지

VLBI Astrometry with Source Frequency Phase Referencing in KVN

  • Jung, Tae-Hyun (Korea Astronomy & Space Science Institute (KASI)) ;
  • Rioja, Maria (International Center for Radio Astronomy Research (ICRAR)) ;
  • Dodson, Richard (International Center for Radio Astronomy Research (ICRAR)) ;
  • Sohn, Bong-Won (Korea Astronomy & Space Science Institute (KASI))
  • 발행 : 2011.04.05
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초록

The multi-band receiving feed which is one of the unique characteristics of the Korean VLBI Network (KVN) system compare to the other VLBI network enables to study precise astrometry with a source frequency phase referencing (SFPR) techniques. SFPR almost perfectly compensates the dominant non-dispersive tropospheric fluctuations by observing sources with multi-frequency simultaneously, and it also corrects the dispersive ionospheric fluctuations by adding a slow source-switching observation. In this talk, I will present the results from the KVN astrometric observations with SFPR and the achievable astrometric accuracy in KVN will be discussed.

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