Measurement Of Range And Bearing - JRC JMA-9133-SA Instruction Manual

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JMA-9100 Instruction Manual

4.MEASUREMENT OF RANGE AND BEARING

4.2
MEASUREMENT OF RANGE AND
BEARING
Target position on the RADAR screen
RADAR antenna transmits pulses of radio waves. The object returns the wave
(radar echo) to the antenna. So on the RADAR screen the leading edge of echo is
the actual target position. The length of echo is dependent on the transmitted pulse
length.
Point the cursor to the leading edge of echo to measure the target range or to make
a mark on the target.
270
Fig 4-2:
Pulse of radio wave
RADAR echo
Fig 4-1:
Transmitting-Receiving of RADAR
0
Own ship's position
Relation of echo, target range and pulse length
4－ 19
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4.2 MEASUREMENT OF RANGE AND BEARING
Pulse length
Target range
4
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