bobbing


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bobbing

[′bäb·iŋ]
(electronics)
Fluctuation of the strength of a radar echo, or its indication on a radarscope, due to alternate interference and reinforcement of returning reflected waves.
References in periodicals archive ?
Bobbing birds, he says, may be alternately detecting prey and determining distance.
Birds' bobbing could provide advantages beyond versatile vision, Frost says.
Would a motionless spring, without the rich variety of bobbing, arching displays of lizards, be just as melancholy?