static air temperature การใช้

In order to compute TAS the air data computer must convert total air temperature to static air temperature.
Combining the above with the expression for Mach number gives an expression for TAS as a function of impact pressure, static pressure and static air temperature ( valid for subsonic flow ):
In simple aircraft, without an air data computer or Machmeter, true airspeed can be calculated as a function of calibrated airspeed and local air density ( or static air temperature and pressure altitude which determine density ).