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Very Long Baseline Interferometry (VLBI)

Very Long Baseline Interferometry (VLBI)
  • Geodetic origin point
  • Triangulation
  • Measurement of Unified Control Point
  • Leveling
  • Gravity Surveying
  • Geomagnetism Surveying
  • Very Long Baseline Interferometry (VLBI)
Very Long Baseline Interferometry (VLBI)
When multiple telescopes (antennas) simultaneously receive radio waves from quasars billions of light years away, VLBI in land surveying can obtain precise measurements of the time differences between the arrivals of radio waves. By analyzing such measurements, VLBI can obtain a highly precise configuration of observational stations.
  • How VLBI works
  • How VLBI works
  • How VLBI works
The first VLBI observatory for geodesy to be installed in Korea will be located in Sejong City, Yeongi-gun, Chungcheongnam-do. Currently, designs are being produced for the system and the observatory building, to be completed by the end of 2011.
  • Bird’s-eye view of VLBI observatory in Sejong City Bird´s-eye view of VLBI observatory in Sejong City
The operation of the VLBI system for geodesy will enable the creation and management of precise measurements of the Korean geodetic horizontal datum, which serves as the basis for all surveying efforts, and improve the accuracy of surveying. The system will also help Korea participate in joint observations, such as intercontinental research on diastrophism, to prepare for natural disasters that can affect the entire planet, thereby contributing to international society and heightening Korea’s role on the global stage. Moreover, Korea will gain advanced technology for surveying the universe, thanks to the techniques of highly precise measurements (within a few millimeters of error per 1,000km).