cosmo k-
Are you sure that's what your book says?
SAT (static) and OAT (outside) are the same and used interchangeably.
RAT (ram) and TAT (total) are the same and used interchangeably. The ram rise will result in a RAT reading approx 26-30 warmer than the SAT/OAT.
I've not used the term True air temp., but I would guess it's SAT without the ram rise.