Just to confirm. OAT is of course Outside Air Temperature of the free undisturbed air. SAT, Static Air Temperature is the temperature messured on the aircraft and is higher that OAT because of ramrise. Now what is True Air Temperature? Since it's "True", I assume it is the same as OAT(?).
I apologize for my confusion
P.s.
My text books are from before anyone ever thought of JAA, and I still can't find any mention of TAT (only OAT and SAT).