temperature error

temperature error
i. A discrepancy in various instruments caused by either the ambient temperature differing from the design limits of the instrument or the temperature variation differing from the one incorporated in the design of the instrument.
ii. A discrepancy arising in an altimeter because the ambient lapse rate differs from one in the standard atmosphere, resulting in a density different from the one calculated. A pressure altimeter indicates higher than true altitude in colder air and lower than true altitude in warmer air.
Aircraft flying toward high pressure.
Aircraft flying toward low pressure.

Aviation dictionary. 2014.

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