Sweden-ESO Submillimeter Telescope
Sweden–ESO Submillimeter Telescope(SEST) A Cassegrain dish antenna of 15-meter diameter for use at wavelengths as short as 0.8 mm. SEST is situated at an altitude of 2300 meters at the European Southern Observatory (ESO) site at La Silla, Chile, and has been in operation since 1989. The reflecting surface is made up of 176 panels positioned to a mean accuracy of 70 micrometers.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006