1) Effectively it was (not the skin, but the TAT probe. The highest temp rise would be at the stagnation point so one can be confident that TAT is a realistic answer for max skin temp).
2)
AFAIK pretty standard:
Q from pitots
S from statics
T from temp probe
Modified by ADC for position error. It's possible that ADC used beta inputs and I'm sure it used alpha inputs to achieve this.
Thanks Ex Wok but now I'm even more confused!
1) So there
is a direct temp reading, from the TAT probe. But where is TAT probe? Is it in the needle nose probe that also measures pitot/static for the intake computers? And how many TAT sensors are there (failure of a single one if that's all there is would not be good)?
2) Mach comes from dynamic pressure (pitots), from static ports, and from temp. But what temp? OAT perhaps?