The Cosmic Anisotropy Telescope (CAT) was a three-element interferometer for cosmic microwave background radiation (CMB/R) observations at 13 to 17 GHz, based at the Mullard Radio Astronomy Observatory. In 1995, it was the first instrument to measure small-scale structure in the cosmic microwave background. When the more sensitive Very Small Array came online in 2000, the CAT was decommissioned and partly dismantled.
References
External links Cosmic Anisotropy Telescope (CAT) online The first detection of small-scale structure in the cosmic microwave background Press release from 1995 describing first measurements of small-scale structure in the cosmic microwave background The CAT enclosure on Google Maps