The High Elevation Antarctic Terahertz telescope is a far-infrared telescope, established by the University of Arizona and the University of New South Wales located at Ridge A at an altitude of 4,053 metres (13,297 ft), considered the most ideal location for observation in the world.^[1] The extraordinary low humidity makes Inner Antarctica the best (by far) region for submillimeter astronomy observations.^[2] The telescope is robotic, remote controlled. It is mostly operated during the local winter, when the average temperature is −70 °C (−94 °F).

High Elevation Antarctic Terahertz Telescope

Alternative names	HEAT
Location(s)	Ridge A, Antarctic Treaty area
Coordinates	81°30′S 73°30′E / 81.5°S 73.5°E / -81.5; 73.5
Organization	University of Arizona University of New South Wales
Altitude	4,040 m (13,250 ft)
Wavelength	150 μm (2.0 THz)–600 μm (500 GHz)
First light	January 2012
Telescope style	infrared telescope
Diameter	60 cm (2 ft 0 in)
Website	soral.as.arizona.edu/heat/
Location of High Elevation Antarctic Terahertz Telescope
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