ver'y long' base'line interferom"etry

Radio Astron.
an interferometry technique that enhances angular resolution in the observation of radio signals from distant celestial objects, as quasars, by combining signals from several radio telescopes around the earth or such signals with those from an earth-orbiting satellite. Abbr.: VLBI

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

Very lightsvery low frequency

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