<s>
The	O
JY-9	B-Algorithm
Radar	I-Algorithm
is	O
a	O
mobile	O
S-band	B-Algorithm
low	O
altitude	B-Application
search	O
radar	B-Application
intended	O
for	O
use	O
in	O
air	O
defense	O
,	O
gap	O
filling	O
,	O
airport	O
surveillance	O
and	O
coastal	O
defense	O
.	O
</s>
<s>
It	O
is	O
designed	O
for	O
effective	O
detection	O
of	O
targets	O
at	O
low	O
altitude	B-Application
in	O
both	O
ECM	O
and	O
natural	O
clutter	O
environments	O
.	O
</s>
<s>
The	O
general	O
designer	O
of	O
JY-9	O
is	O
the	O
head	O
of	O
38th	O
Research	O
Institute	O
,	O
academician	O
of	O
Chinese	O
Academy	O
of	O
Sciences	O
Mr.	O
Wu	O
Manqing	O
( 吴曼青	O
,	O
Aug	O
1965	O
-	O
)	O
,	O
who	O
is	O
also	O
the	O
general	O
designer	O
of	O
JY-8	B-Algorithm
and	O
the	O
general	O
designer	O
of	O
the	O
radar	B-Application
systems	I-Application
for	O
KJ-2000	O
and	O
KJ-200	O
.	O
</s>
<s>
It	O
consist	O
of	O
a	O
radar/operations	O
shelter	O
,	O
an	O
antenna	O
pallet	O
and	O
a	O
power	O
station	O
shelter	O
and	O
is	O
transportable	O
by	O
air	O
,	O
rail	O
,	O
and	O
sea	O
.	O
</s>
<s>
The	O
JY-9	O
has	O
high	O
anti-jamming	O
and	O
anti-clutter	O
capability	O
due	O
to	O
the	O
use	O
of	O
advanced	O
techniques	O
,	O
including	O
pulse	B-Algorithm
to	O
pulse	B-Algorithm
frequency	O
agility	O
,	O
dual	O
channel	O
,	O
JATS	O
,	O
wide	O
operating	O
band	O
,	O
low	O
sidelobes	O
,	O
MTD	O
automatic	O
spectrum	O
processing	O
,	O
automatic	O
clutter	O
map	O
and	O
automatic	O
residue	O
map	O
.	O
</s>
<s>
The	O
JY-9F	O
three-dimensional	O
low-altitude	O
surveillance	O
radar	B-Application
,	O
is	O
a	O
new	O
derivation	O
of	O
the	O
JY-9	O
low-altitude	O
radar	B-Application
.	O
</s>
<s>
It	O
is	O
a	O
fully	O
coherent	O
pulse-compression	O
radar	B-Application
with	O
a	O
high	O
reliability	O
and	O
mobility	O
and	O
can	O
provide	O
low-flying	O
target	O
information	O
for	O
national	O
air	O
defence	O
information	O
networks	O
or	O
for	O
AAA	O
or	O
air	O
traffic	O
control	O
systems	O
.	O
</s>
<s>
This	O
advanced	O
radar	B-Application
incorporates	O
the	O
state-of-the-art	O
techniques	O
.	O
</s>
<s>
The	O
excellent	O
low	O
sidelobe	O
antenna	O
employed	O
in	O
the	O
system	O
has	O
greatly	O
enhanced	O
the	O
radar	B-Application
's	O
anti-clutter	O
capability	O
and	O
ECCM	O
performance	O
,	O
giving	O
improved	O
low-altitude	O
detection	O
performance	O
.	O
</s>
<s>
Three	O
AMTI	O
processing	O
channels	O
are	O
used	O
,	O
each	O
equipped	O
to	O
handle	O
a	O
particular	O
environmental	O
condition	O
,	O
thereby	O
providing	O
maximum	O
low-altitude	O
target	O
detection	O
.	O
</s>
<s>
The	O
JY-9F	O
radar	B-Application
is	O
characterised	O
by	O
high	O
reliability	O
and	O
maintainability	O
with	O
an	O
MTBF	O
of	O
more	O
than	O
400	O
hours	O
and	O
MTTR	O
of	O
less	O
than	O
30	O
minutes	O
.	O
</s>
