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What Is Radar
The word "radar" was invented by scientists of the United States Navy
during World War II. The word comes from the first letters in the term
"radio detection and ranging.""Detection," as used here, means finding an
object or target by sending out a radio signal that will bounce back off
the target as a radio echo. "Ranging" means measuring the distance to the
target from the radar set(the device tat sends out the radio signal and
picks up the returning echo).
Radar set on the ground uses radio echoes to locate aircraft, ships,
and other objects. Radar sets can locate artificial satellites and
spacecraft thousands of k ....
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