Yuan-Tseh Lee Array

The Yuan-Tseh Lee Array (YTLA or Yuan-Tseh Lee Array for Microwave Background Anisotropy, originally called AMiBA for Array for Microwave Background Anisotropy) is a compact radio/microwave interferometer on Mauna Loa in Hawaii, for studying CMB anisotropies, the Sunyaev-Zel'dovich effect in particular. It began operation in 2006 with 7 closely-grouped dishes and after the first round of observation, was rebuilt with 13. By design, its observations were within the longer-wavelength tail of the CMB spectrum. Since completion of its CMB mapping, after some adaptation, it has been used for AIM-CO, line intensity mapping of redshifted CO lines.