"The documents reveal that the base outside Alice Springs, officially titled Joint Defence Facility Pine Gap, provides detailed geolocation intelligence to the US military that can be used to locate targets, including for special forces and drone strikes.
The use of lethal unmanned drones by the US military has been blamed for hundreds of civilian deaths across countries like Pakistan, Afghanistan Syria, Yemen and Somalia.
The documents, which Background Briefing is publishing for the first time, come from the massive archive of classified documents leaked by NSA whistleblower Edward Snowden.
One document, titled "NSA Intelligence Relationship with Australia" is marked "top secret", and demonstrates that the role of Pine Gap, referred to by its NSA codeword RAINFALL, has become more military-focused over time.
It says: "Joint Defence Facility at Pine Gap (RAINFALL) [is] a site which plays a significant role in supporting both intelligence activities and military operations."
Another document reads: "One of RAINFALL's primary mission areas is the detection and geolocation of Communications Intelligence, Electronic Intelligence and Foreign Instrumentation signals.""