Took a little bit of digging around to find where (since it is military), and found an article that it's in Exmouth, W.A.
Looking at google maps, it could be a possibility that it's on the grounds of the Naval Communication Station Harold E.Holt :-
https://goo.gl/maps/ESghPHuU6Ukmx4m9A
But I am checking out the surroundings to see if it could be located elsewhere.