<s>
The	O
AN/APS	O
-154	O
Advanced	B-Algorithm
Airborne	I-Algorithm
Sensor	I-Algorithm
(	O
AAS	O
)	O
is	O
a	O
multifunction	B-Architecture
radar	I-Architecture
installed	O
on	O
the	O
P-8	O
Poseidon	O
maritime	O
patrol	O
aircraft	O
.	O
</s>
<s>
The	O
radar	B-Application
is	O
built	O
by	O
Raytheon	O
as	O
a	O
follow-on	O
to	O
their	O
AN/APS	O
-149	O
Littoral	O
Surveillance	O
Radar	B-Application
System	I-Application
(	O
LSRS	O
)	O
.	O
</s>
<s>
The	O
radar	B-Application
was	O
deployed	O
on	O
a	O
small	O
number	O
of	O
P-3C	O
Orions	O
,	O
with	O
"	O
game	O
changing	O
"	O
results	O
.	O
</s>
<s>
Containing	O
a	O
double-sided	O
AESA	B-Architecture
radar	I-Architecture
with	O
near	O
360-degree	O
coverage	O
,	O
it	O
could	O
scan	O
,	O
map	O
,	O
track	O
,	O
and	O
classify	O
targets	O
,	O
and	O
do	O
all	O
of	O
these	O
tasks	O
near	O
simultaneously	O
;	O
it	O
was	O
reportedly	O
sensitive	O
enough	O
to	O
pick	O
up	O
a	O
formation	O
of	O
people	O
moving	O
over	O
open	O
terrain	O
.	O
</s>
<s>
Building	O
upon	O
the	O
LSRS	O
,	O
the	O
AAS	O
also	O
has	O
a	O
double-sided	O
AESA	B-Architecture
radar	I-Architecture
,	O
which	O
contains	O
a	O
moving	O
target	O
indicator	O
(	O
MTI	O
)	O
that	O
can	O
detect	O
,	O
classify	O
,	O
and	O
track	O
targets	O
on	O
land	O
and	O
at	O
sea	O
at	O
the	O
same	O
time	O
,	O
with	O
synthetic	B-Application
aperture	I-Application
radar	I-Application
(	O
SAR	O
)	O
and	O
inverse	B-Algorithm
synthetic	I-Algorithm
aperture	I-Algorithm
radar	I-Algorithm
(	O
ISAR	O
)	O
for	O
picture-like	O
radar	B-Application
imagery	O
of	O
both	O
inland	O
and	O
ocean	O
areas	O
at	O
the	O
same	O
time	O
;	O
these	O
can	O
profile	O
vessels	O
from	O
a	O
long	O
distance	O
and	O
generate	O
fine	O
resolution	O
without	O
relying	O
on	O
optical	O
sensors	O
,	O
especially	O
in	O
day	O
or	O
night	O
and	O
in	O
adverse	O
weather	O
conditions	O
.	O
</s>
