same 'home' as the P8s
From the RAAF web site.
RAAF Base Edinburgh is primarily home to No 92 Wing's AP-3C Orion maritime patrol aircraft that conduct surveillance operations throughout Australia's airspace, Aerospace Operational Support Group that conducts research and development.
P8s to replace the P3s. Tritons to supplement the P8s.
As for why 92 Wing is there in the 1st place ... don't know