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Chapter 4. Screen view
4.1 The distance from the target to the height of target
The longest distance observable to the target is depending on the height of target,
the distance to the target and the height of antenna other than the matter of
performance like Tx power, Antenna beam width and receiving sensitivity. Radar
signal
is
linear
nature
that
is
not
affected
by
a
round
earth.
RADAR
TARGET
EARTH
A1
A2
A1 = 2.23√H1
A2 = 2.23√H2
A1+A2 = 2.23(√H1+√H2)
A1, A2 : [NM]
H1, H2 : [m]
H2
H1
For example, when the height of antenna is 3 meters above sea level, the ECHO
image of island of 10 meters’ height and 10 miles away from the antenna can be
displayed on Screen but the 5 meter’s height with same distance is not displayed on
screen since Radar signal transmitted does not reach.
But, these are of theoretical value and would not be constant due to environmental
condition. In theory, the target 10 miles away from the antenna requires 7.6 meters’
height, if it is lower than 7.6 meter, ECHO image would not appear for which you
must keep in mind.
10m
5m
3m
10NM
10NM
화면에 표시 되지 않는 섬
The island, which is not displayed on Screen
Summary of Contents for SMR-3700
Page 14: ...14 Display Menu Communication Menu System Menu Initial Display...
Page 51: ...51 Scanner Unit RSU 3700...
Page 52: ...52 Display Unit SMR 3700...
Page 55: ...55...