About IVS

About VLBI

VLBI conceptThis page provides links to basic information about VLBI, its history, geodetic VLBI, and other topics related to IVS. VLBI is a geometric technique: it measures the time difference between the arrival at two Earth-based antennas of a radio wavefront emitted by a distant quasar. In the VLBI concept of the near future broad-spectrum is recorded at radio telescopes and transmitteed via high speed data links to a correlator.

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