Hello, I've been reading an advanced flight training manual and came across these terms;SAT, TAT, and FREE AIR TEMP GAUGE. Could somebody explain these terms so even I could understand them.It would be much appreciated. I also have another perplexing question that I just can't seem to grasp. Here goes... If a jet is travelling at max power at sea level and an identical jet is doing the same at 37,000 ft which jet is going faster ? (WHY) could someone please enlighten me.