The Submillimeter Array

The Submillimeter Array (SMA) is an 8-element radio interferometer located near the summit of Maunakea in Hawaii. Operating at frequencies from 180 GHz to 420 GHz, the 6 m diameter dishes may be arranged into configurations with baselines as long as 509 m, producing a synthesized beam of sub-arcsecond width. Each element can observe with two receivers simultaneously, with up to 8 GHz bandwidth each per sideband. The digital correlator backend provides a uniform resolution as high as 140 kHz.