Australia Telescope Compact Array


Australia Telescope Compact Array
CSIRO ScienceImage 3881 Five Antennas at Narrabri - restoration1.jpg
Five of the ATCA antennas at Narrabri
Alternative namesATCA Edit this at Wikidata
Part ofPaul Wild Observatory Edit this on Wikidata
Location(s)New South Wales, AUS
Coordinates30°18′46″S 149°33′01″E / 30.312777777778°S 149.55027777778°E / -30.312777777778; 149.55027777778Coordinates: 30°18′46″S 149°33′01″E / 30.312777777778°S 149.55027777778°E / -30.312777777778; 149.55027777778 Edit this at Wikidata
OrganizationCSIRO Edit this on Wikidata
Telescope stylecosmic microwave background experiment
radio interferometer Edit this on Wikidata
Australia Telescope Compact Array is located in Australia
Australia Telescope Compact Array
Location of Australia Telescope Compact Array
Commons page Related media on Wikimedia Commons

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 Australia.[1]


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. Five of the dishes can be moved along a three-kilometre (2 mi) railway track oriented east-west. The sixth antenna is situated three kilometres west of the end of the main track. Each dish weighs about 270 tonnes (270 long tons; 300 short tons).

The Compact Array is a part of the Australia Telescope National Facility network of radio telescopes. 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.[1]

The Array welcomes visitors from the general public. The facility includes a Visitor's Centre where the operations of the array can be observed in comfort and shade, and it has a range of informational displays and audiovisual presentations, while the surrounding grounds have displays and activities for visitors. Open Days are run regularly, and to mark special events such as the anniversary of the first Moon landing, or major anniversaries of the telescope itself.[2]

The children's/young adult drama Sky Trackers was filmed in this facility in 1994 with the radio telescopes being prominently featured.

See also


  1. ^ a b Sault, Bob; Mirtschin, Peter (14 December 2018). "Australia Telescope Compact Array: Information for the public". CSIRO. Retrieved 2 February 2020.
  2. ^ "Narrabri Visitors Centre: Visiting the Observatory". CSIRO. Retrieved 16 June 2014.
  3. ^ "Building the ATCA". Retrieved 20 February 2016.

External links

  • Australia Telescope Compact Array Home Page contains links for the general public and for professional astronomers
  • ATCA Live! website shows current observations
  • ATCA sky camera shows the sky above the ATCA
  • John Paul Wild (Wikipedia article about the founder of the observatory)