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A two-dimensional error distribution



Related Terms

ACCURACY

The degree to which measurement by a field instrument compares with measurement by a laboratory instrument or other standard reference equipment. The instrument accuracy represent an allowable tolerance limit for single readings by a specific device. These tolerances (+ and -) are the maximum ranges of error for recording the product movement.

EFFECTIVE RANGE

The range of values of the measured quantity for which any single measurement, obtained under specified conditions of use of a measuring instrument, should not be in error by more than a specified amount. NOTE: The effective range may be the whole or a specified part of the interval between the lower and upper range limits. Also known as measuring range, working range

SUPPLEMENTARY ERROR

The error of a measuring instrument arising from the fact that the values of the influence quantities differ from those corresponding to the reference conditions.

TOTAL ERROR

The whole error of a measuring instrument under specified conditions of use.

OVERALL ERROR

The whole error of a measuring instrument under specified conditions of use.

ACCELERATION ERROR

The error resulting from change in velocity (either speed or direction); specifically, deflection of the apparent vertical, as indicated by an artificial horizon, due to acceleration. Also called BUBBLE ACCELERATION ERROR when applied to an instrument using a bubble as an artificial horizon.

ACCIDENTAL ERROR

An error of accidental nature

BALLISTIC DAMPING ERROR

A temporary oscillatory error of a gyrocompass introduced during changes of course or speed as a result of the means used to damp the oscillations of the spin axis

BALLISTIC DEFLECTION ERROR

A temporary oscillatory error of a gyrocompass introduced when the north-south component of the speed changes, as by speed or course change. An accelerating force acts upon the compass, causing a surge of mercury from one part of the system to another in the case of the non pendulous compass, or a deflection (along the meridian) of a mass in the case of a pendulous compass. In either case, a precessing force introduces a temporary ballistic deflection error in the reading of the compass unless it is corrected

XTE

Cross Track Error

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