Very Long Baseline Interferometry

  • J. M. Moran
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUH, volume 8)


The technique of very long baseline interferometry (VLBI) has undergone two decades of steady growth and refinement since its inception in 1967. In the beginning, only crude measurements of visibility on single baselines were possible. Now 18-station arrays have been used to produce images with dynamic ranges exceeding 2000:1; relative motions of cosmic masers have been tracked at the microarcsecond level of accuracy; and angular size measurements have been made with baseline lengths up to 2 two earth diameters with an orbiting satellite as a receiving element.


Very Long Baseline Interferometry Baseline Length Plane Coverage Single Baseline Very Long Baseline Interferometry Observation 
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Copyright information

© International Astronomical Union 1989

Authors and Affiliations

  • J. M. Moran
    • 1
  1. 1.Harvard-Smithsonian Center for AstrophysicsCambridgeUSA

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