(submillimeter instrument on James Clark Maxwell Telescope)
SCUBA (for Submillimetre Common-user Bolometer Array) is
the name of two instruments (SCUBA-1 and SCUBA-2)
on the James Clerk Maxwell Telescope in Hawaii.
SCUBA-1 had 91 pixels at 450 microns and 37 pixels
at 850 microns, and detected black-body radiation from
dust. It was deployed in the 1990s and
retired in 2005.
SCUBA-2 has 5120 array elements (transition edge sensors) at each of the same two
wavelengths, and was deployed in November 2011.
It was used to carry out the SCUBA-2 All Sky Survey
(aka SCUBA-2 Ambitions Sky Survey or SASSy),
a survey of the northern sky with an angular resolution
of 14 arcseconds.