Submillimeter Wave Astronomy Satellite

The Submillimeter Wave Astronomy Satellite (SWAS) was a NASA SMEX space submillimeter telescope. It was an off-axis Cassegrain reflector with a 55-cm × 71-cm oval aperture. It was launched in 1998, turned off in 2004, then used briefly in 2005 to assist in the Deep Impact mission. Its primary research area was molecular clouds, mapping a number of molecular spectral lines.