The Sydney radar operator on 124.55 was most helpful. He said to me, “We don’t have ADS-B because we have excellent SSR coverage in the Sydney area.” Presumably that is also why they haven’t fitted it to Canberra Approach, or the Adelaide Approach facility.
Dick,
As you probably know, they also have very good primary radar cover as well.
After all, somebody up to no good is hardly going to leave their transponder on.
One figure I saw, some time ago, quoted in terms of newly planned upgrades of primary radar cover, "85%" of the Australian population (which is conveniently where most of the remaining air traffic is found) would be covered from aerial threats by the "new" high precision primary radar being touted.
Tootle pip!!