The Australia Telescope Compact Array (ATCA) is a radio telescope operated by CSIRO at the Paul Wild Observatory, twenty five kilometres (16 mi) west of the town of Narrabri in New South Wales, Australia.

[2] The telescope is an array of six identical 22-metre (72 ft) diameter dishes, which commonly operate in aperture synthesis mode to produce radio images.

The array is frequently operated together with other CSIRO telescopes, the 64-metre (210 ft) dish at the Parkes Observatory and a single 22-metre (72 ft) dish at Mopra (near Coonabarabran), to form a very long baseline interferometry array.

[3] The children's/teen's television adventure series Sky Trackers was filmed in this facility in 1993,[4] with the radio telescopes being prominently featured.

Whilst remaining a telescope predominantly dedicated to radio-astronomy,[4] in 2007, the Compact Array was outfitted with receivers enabling it to receive radio waves 7 mm long, allowing it to be used from time to time to help NASA track spacecraft.