TAT/SAT=1+(g-1)/2 *M^2
g= gamma= cp/cv. The ratio of specific heats at constant P,V. (1.4 for air at STP.)
M= mach number.
The temp as measured by a probe (eg rosemount) is slightly different to the true TAT, due to a number of factors.
Last edited by Re-entry; 14th September 2006 at 15:04.