Difference between revisions of "Guidance"
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Revision as of 09:34, 9 April 2007
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Guidance
</dt>
The process of directing the movements of an aeronautical vehicle or space
vehicle, with particular reference to the selection of a flight path. See control.
</dd>
In preset guidance a predetermined path is set into the guidance
mechanism and not altered, in inertial guidance accelerations are measured and
integrated within the craft, in command guidance the craft responds to
information received from an outside source. Beam-rider guidance utilizes a
beam; terrestrial-reference guidance, some influence of the earth; celestial
guidance, the celestial bodies and particularly the stars; and homing guidance
the information is in response to transmissions from the craft, in semiactive
homing guidance the transmissions are from a source other than the craft, and
in passive homing guidance natural radiations from the destination are
utilized. Midcourse guidance extends from the end of the launching phase to an
arbitrary point enroute and terminal guidance extends from this point to the
destination.
</dd>
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
