back echo

back echo

[′bak ‚ek·ō]
(electromagnetism)
An echo signal produced on a radar screen by one of the minor back lobes of a search radar beam.
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Devised by former University of Mississippi scientist Robert Derrow in close collaboration with ARS scientists, BASIS emits a pulse of acoustic energy and then gauges the strength and travel time of the back echo to determine sediment's location and concentration.
Typically a front echo and back echo will be seen as the sound wave bounces off the front and back surface of the casting.
LOOKING BACK Echo reporter Fred Brenton takes a look at who was sleeping in his bed 100 years ago.