time reference scanning beam


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time reference scanning beam

[′tīm ‚ref·rəns ′skan·iŋ ‚bēm]
(navigation)
A radio or radar beam which is swept to and fro over a sector of space and in such a manner that the interval between reception of successive pulses at an aircraft indicates the aircraft's altitude or azimuth.
A system of ground equipment that generates such beams at microwave frequencies to furnish guidance to aircraft making microwave landings. Abbreviated TRSB.
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