pulse-coded scanning beam

pulse-coded scanning beam

[′pəls ¦kōd·əd ′skan·iŋ ‚bēm]
(navigation)
A radio or radar beam which is swept over a sector of space and is accompanied by a repeated pattern of pulses that is varied to indicate the position of the beam in space.
A system of ground equipment that generates such beams at microwave frequencies to furnish guidance to aircraft making microwave landings. Abbreviated PCSB.
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