1 - NGA

. . . MIL-HDBK-850
dynamk height-A height derived by dividng
the geopotenfiel nunber by a constant, usually
the value of normal grevity at 4S” Ialih.rde.
dynamic number-The work required 10 raise
a untf mass from sea level to a given point,
expressed in abaotule units.
dynamic tom~rsituro correctlon—
(penduhxm) The correction to tfse observed
period of a pendulum for the rate of change of
its temperature.
dynamical mean wn-A fictitious sun
conceived to nmve easrward along the ecfiiic
at the average rafe of the apparent sun.
dyne—The dyne is the unit of lorce of the C.O,S.
systems of units. When acting on a mass of 1
gram, a dyne imparts to that mass an
acceleration of 1 centimeter par secomi per
second. Unfil abouf 1930, me dyne was used by
the U.S. Coaar and Geodetic Survey (now the
National Gaodatk Survey) in atatino values of
gravity. Since Ihal time, gravity has been
reported in terms of the gal, the e.g. s unit of
accaleratiin.
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