Thermal Heating

The friction of the atmosphere across an wing, ship, body will heat the object.
Reentry can be a very dangerous time,
because you are impacting the air at a High speed,
but there is not enough to help cool the ship.

Outside Air Temperature

Outside Air Temperature is displayed as OAT.
This is the air temp taken in Kevin.

Static Air Temperature

Static Air Temperature is displayed as SAT.
This is the air temp taken with a standard thermometer in still air and no sun shining on it.

• For the purpose practicality OAT(in K) and SAT(in C) are basically the same just different scales.

Ram Air Temperature

Often called Ram Air or RAT
This is a measure of how much the compression of the air is heating it. SAT+RAT= TAT

Total Air Temperature

Total Air Temperature is what you track to see how much the Air will heat your Air Frame
The lower the Dynamic Pressure and Air pressure the less TAT can affect you.
In space you may only be impacting a few molecules a second with the entire air frame.
Yes each molecule imparts energy but there are so few that you can still cool through radiation.

Air Frame Temperature

You will find this listed as AFT on most displays.
This is usually a direct reading of the most critical part of the ship.
This typically is were a wing meets the body.
The interaction of the two shock waves can super heat the air mass in a local area.