Which type of airspeed is true airspeed (TAS) corrected for?

True Airspeed (TAS) is the actual speed of the aircraft through the air, factoring in the effects of pressure and temperature. The correct option indicates that TAS is influenced primarily by pressure conditions. At higher altitudes, the air becomes less dense, which affects the measurement of airspeed. This means that to accurately determine where an aircraft stands in terms of its actual speed relative to the air surrounding it, adjustments must be made for the lower pressure and temperature encountered at altitude.

The other options refer to different concepts. Wind conditions can affect the ground speed of an aircraft but do not directly correct the TAS itself; this velocity is independent of wind. Instrument errors relate to discrepancies in airspeed measurements but are not directly associated with the calculation of TAS. Standard temperature is a baseline used in calculations but does not represent the specific corrections needed for determining TAS in varying atmospheric conditions.