Hmmm, you've been
Googling, methinks.
Yes, at one time it was the Fleur field site for the CSIRO Radioastronomy program, but BEFORE THAT, in WW2, it was Fleur Airbase. This was the parent airfield for the US Navy Fleet Air Arm, which also controlled 5 other minor "Satellite" strips.
It is believed that this base was the point from which the only sucessful Air Raid on the Lithgow Small Arms Factory was launched. The Americans quite embarassed the AA defences, but it did prove Naval Aviators had the navigational skill to cross the featureless mountains, which was believed at the time to be a significant natural defence from Air Attack.