I've mentioned it before in another thread , but here goes .... again !
Precision GPS works perfectly well in the aviation environment , Aerial Agriculture has been using it for decades now at 140kt plus , and with for those with even a basic understanding how GPS systems function , it is easy to comprehend that mach 5 wouldn't concern it in the slightest .
We used to use satellite differential to correct the dither with two correction stations in Australia at the time ( yes subscriptions were expensive ! ) and achieved 5cm accuracy , since S.A was turned off we no longer require any Diff as we still achieve sub 20cm which is fine for our purpose .
Sure ground based systems for tractors require cm accuracy which is provided by B-line etc. utilising ground based differential ... nothing to do with speed ... simply higher levels of precision for the task .
As always aviation is miles behind the technology curve..... actually I will rephrase that , aviation has always had it's share of innovators , it's the Regulator who is miles behind the curve !
Last edited by airag; 25th Apr 2018 at 08:44.
Reason: Addition