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Chap
pter 1 INST
TALLATION
1.3 IN
NSTAL
1.3.1
SELEC
PHYS
SICAL S
Install the
If the sca
deviation
precautio
Please n
Please se
ELEC
CTRICAL
The insta
The high
above the
As a resu
Determin
length of
scanner i
and chim
on the ra
1.3.2
LOWES
Generally,
the lowest s
In the case
e of the JMA
Specifically
y, the scanne
not interfere
e with radiat
12
N
LLATIO
ON OF T
TING T
HE INST
ELECTIO
ON CRIT
e scanner at
t the center
anner canno
t be installe
n must be mi
inimized. An
nd, reinforce
ons to protec
ct the scann
ner from vibr
ote that not
affected by
ecure maint
tenance spa
aces (a platfo
L SELEC
CTION CR
RITERIA
allation heigh
ht of the sca
anner relates
er, the bette
er. However,
e scanner's
vertical bea
am width (the
ult, it is diffic
cult to detect
ne the install
lation height
the cable, a
and mainten
nance after in
is low, it is d
difficult to de
etect a long d
mney interfer
re with radia
dar display
to increase.
ST SCA
ANNER I
scanner insta
allation posi
-1030 series
s radar, 2θ e
er position is
s normally e
elevated so t
ting beam.
JMA-
-1030 : θ=
THE SC
CANNE
ER UNI
TALLAT
TION PO
OSITION
ERIA
of the mast
on the keel
line.
d at the abo
ove position
for some re
e the mount
base and th
ration and im
mpact at the
the smoke f
from the chi
imney.
orm, a safet
ty link, a han
s to the max
ximum detec
, if it is too h
high, radio w
wave energy
e point -3 dB
B from the p
t a close-in t
target. Sea c
clutter also i
t by taking in
nto consider
ration the we
nstallation. I
If the installa
distance targ
get. The shi
ting beam c
causing the r
range that c
NSTAL
LATION
N HEIGH
ition is supp
osed to be o
on the A-B l
equals 25°.
that the chim
mney and th
= 12.5 °
2θ=
25 °
Fig. 1-3-
-2
IT
N
ason, the am
mount of
he platform a
and take
installation
position.
ndrail, a step
p, etc.).
ction distanc
ce.
greatly atte
enuates
peak of the m
main-lobe).
increases.
eight, maxim
mum
ation height
of the
p's mast, de
errick,
cannot be vie
ewed
HT
ine shown in
n Fig. 1-3-2.
.
he shrine-gat
te type mas
t do
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