True airspeed (TAS) is the actual speed of an aircraft relative to the surrounding air mass in which it is flying. It is measured with respect to the surrounding air rather than to the ground. TAS is a crucial parameter in aviation for flight planning, navigation, performance calculations, and ensuring safe and efficient operation of the aircraft.
Where:
- is the true airspeed (in m/s )
- is the total pressure of the air (in pascals),
- is the static pressure of the air (in pascals),
- is the air density (in kg/m3).