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Angular resolution of the EVN

The finest angular resolution of an interferometer (in radians) is given by the ratio of the observing wavelength to the maximum baseline.

Baseline Length

Table of EVN (and some global) baseline lengths (in km).

Maximum Angular Resolution

The maximum angular resolution (in milliarcseconds) of some typical EVN and Global VLBI arrays are presented below:

Array90 cm18cm6cm3.6 cm1.3 cm0.7cm
EVN-155310.6
EVN (inc. Sh/Ur)3051.510.30.15
EVN+VLBA19310.70.250.13

Even higher resolution observations were possible using ground-based arrays together with the Japanese SVLBI orbiting radio telescope, Halca.


Last modified: January 08, 2019
EVN webmaster (jive{at}jive.eu)