The Australia Telescope Compact Array (ATCA) is a radio telescope operated by CSIRO at the Paul Wild Observatory, twenty five kilometres (16Â mi) west of the town of Narrabri in New South Wales, Australia. Its opening ceremony took place on September 2, 1988.
The 22-metre Mopra Radio Telescope, located near Coonabarabran, New South Wales, is part of the Australia Telescope National Facility, operated by CSIRO. The name hails from the location of the facility close to Mopra Rock a geological formation overlooking the telescope. It is also close to the Siding Spring optical observatory in the Warrumbungle National Park.
For use as a single-dish, it has niche equipment allowing large bandwidths to be observed at millimeter-wavelengths. Being a part of the Australia Telescope, it is often used in conjunction with other AT antennas (e.g., the Australia Telescope Compact Array at Narrabri, and the 64-metre Parkes dish) to form a Very Long Baseline Interferometry (VLBI) array.