Parkes Observatory refers to a single Radio Telescope also referred to as the Parkes 64m (Radio) Telescope or Parkes 210ft (Radio) Telescope. It has been in operation in 1963, and has been used for communication with spacecraft as well as astronomical observations.
Current instruments (receivers):
Galactic All-Sky Survey (GASS)
Parkes Catalog (PKS)
Parkes-MIT-NRAO Surveys (PMN)
Parkes Pulsar Timing Array (PPTA)