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	Eng ID	Term	Definition
	1701	error: polarization	ERROR in a RADIO BEARING or the COURSE indicated by a RADIOBEACON, due to horizontally-polarized components of the electric field under cert... more ERROR in a RADIO BEARING or the COURSE indicated by a RADIOBEACON, due to horizontally-polarized components of the electric field under certain transmission conditions. The terms night error or night effect have become obsolete.
	1702	error: probable	An ERROR (or deviation from the mean) of such magnitude that the likelihood of its being exceeded in a set of OBSERVATIONS is equal to the l... more An ERROR (or deviation from the mean) of such magnitude that the likelihood of its being exceeded in a set of OBSERVATIONS is equal to the likelihood of its not being exceeded; its value is that of the STANDARD ERROR multiplied by 0.6745. The use of STANDARD ERROR is sometimes preferred in statistical studies.
	1703	error: random	See ERROR: ACCIDENTAL.
	1704	error: regular	See ERROR: SYSTEMATIC.
	1705	error: residual	The difference between any value of a quantity in a series of OBSERVATIONS, corrected for known SYSTEMATIC ERRORS, and the value of the quan... more The difference between any value of a quantity in a series of OBSERVATIONS, corrected for known SYSTEMATIC ERRORS, and the value of the quantity obtained from the ADJUSTMENT of that series. Sometimes termed as residual.
	1706	error: root mean square	See ERROR: STANDARD.
	1707	error: sextant	The ERROR in the reading of a SEXTANT, due either to lack of proper ADJUSTMENT or to imperfection of manufacture.
	1708	error: standard	The square root of the arithmetic mean of squared deviations from the mean. Also calledstandard deviation,when the deviations do not represe... more The square root of the arithmetic mean of squared deviations from the mean. Also calledstandard deviation,when the deviations do not represent ERRORS, or root mean square error.
	1709	error: station	See DEFLECTION OF THE VERTICAL.
	1710	error: swirl	The additional ERROR in the reading of a MAGNETIC COMPASS during a turn, due to friction in the compass liquid.
	1711	error: systematic	Component of measurement ERROR that remains constant or varies in a predictable manner. Also called regular error.
	1712	error: theoretical	A SYSTEMATIC ERROR arising from natural physical conditions, beyond the control of the observer. Also called external error.
	1713	error equation	See EQUATION.
	1714	error of closure	The amount by which a quantity obtained by a series of related measurements differs from the true or fixed value of the same quantity. Also ... more The amount by which a quantity obtained by a series of related measurements differs from the true or fixed value of the same quantity. Also called closing error.
	1715	error of closure of horizon	The amount by which the sum of a series of adjacent measured horizontal angels around a point fails to equal exactly 360°.
	1716	error of closure of triangle	The amount by which the sum of the three observed angles of a triangle fails to equal exactly 180° plus the SPHERICAL EXCESS of the triangle... more The amount by which the sum of the three observed angles of a triangle fails to equal exactly 180° plus the SPHERICAL EXCESS of the triangle. Also referred to as closure of triangle.
	1717	error of collimation	The angle between the LINE OF COLLIMATION (LINE OF SIGHT) of a TELESCOPE and its COLLIMATION AXIS; i.e., the angle by which the LINE OF SIGH... more The angle between the LINE OF COLLIMATION (LINE OF SIGHT) of a TELESCOPE and its COLLIMATION AXIS; i.e., the angle by which the LINE OF SIGHT of an optical instrument differs from what it should be. Also called collimation error.
	1718	error of graduation	Inaccuracy in the GRADUATIONS of the SCALE of an instrument. Also called graduation error.
	1719	error of magnetic compass	The angle by which a compass direction differs from the true direction; the algebraic sum of VARIATION and DEVIATION.
	1720	error of run (micrometer)	The difference in SECONDS of arc, between the intended value of one turn of the MICROMETER SCREW and its actual value as determined by measu... more The difference in SECONDS of arc, between the intended value of one turn of the MICROMETER SCREW and its actual value as determined by measuring the space between two adjacent graduation marks of the CIRCLE with the MICROMETER. Also called run of micrometer.
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