(Balloon-borne Large Aperture Submillimeter Telescope)
(balloon-borne 1.8-m submillimeter telescope)
BLAST (for
Balloon-borne Large ApertureSubmillimeter Telescope)
is a 1.8-meter far infraredtelescope
that is flown in a high-altitude balloon.
It has made several flights from different locations,
including Antarctica, its first operational
flight in 2005. Its second operational flight damaged
the original 2-meter operational mirror,
which was replaced by a 1.8-meter mirror.
Its instrument is an imaging Fourier transform spectrometer, modeled after
the Herschel Space ObservatorySPIRE design, and the project
served as a pilot for that instrument.
A follow-on balloon-borne project, BLASTPol,
including polarimetry was carried in the 2010-2012 time frame.
A third version, BLAST-TNG flew in January 2020, but
the instrument was destroyed on landing.
As of 2024, a fourth version is proposed, called BLAST Observatory.