Australia Telescope Compact Array

The Australia Telescope Compact Array (ATCA) is a radio telescope in New South Wales, Australia operated by the CSIRO (Commonwealth Scientific and Industrial Research Organisation) at the Paul Wild Observatory, in operation since 1988. It consists of six 22-meter dishes with baselines up to 6 km, with receivers for frequencies ranging from 1.1 GHz to 105 GHz, which should allow angular resolutions down to about 0.1 arcsecond (i.e., with ideal configuration, observation direction, and wavelength). They are also used for very-long-baseline interferometry with other Australian radio telescopes, as the Long Baseline Array (LBA). The LBA and the ATCA were the two components of a 1980s project called the Australia Telescope (AT).