IMAGE: Panoramic View of the SMA in the fog. credit: N. Patel.
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The Submillimeter Array (SMA) is an 8-element radio interferometer located atop Maunakea in Hawaii. Operating at frequencies from 180 GHz to 418 GHz, the 6m dishes may be arranged into configurations with baselines as long as 509m, 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 of 140 kHz. The Submillimeter Array is a joint venture of the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics.


The 2023A proposal results released 8 May 2023. Results are available via your 'My Projects' page, on each proposal's main project page.

Please note that the EXT and VEX configurations ending 2022B
have unfortunately been canceled.

The standard proposal submission system is now closed. Please see DDT Proposals for urgent requests.