<s>
The	O
AN/APG	B-Algorithm
-77	I-Algorithm
is	O
a	O
multifunction	O
low	O
probability	O
of	O
intercept	O
radar	O
installed	O
on	O
the	O
F-22	B-Application
Raptor	I-Application
fighter	O
aircraft	O
.	O
</s>
<s>
It	O
is	O
a	O
solid-state	O
,	O
active	B-Architecture
electronically	I-Architecture
scanned	I-Architecture
array	I-Architecture
(	O
AESA	O
)	O
radar	O
.	O
</s>
<s>
The	O
APG-77	B-Algorithm
provides	O
120°	O
field	O
of	O
view	O
in	O
azimuth	O
and	O
elevation	O
,	O
.	O
</s>
<s>
APG-77	B-Algorithm
has	O
an	O
operating	O
range	O
of	O
while	O
unconfirmed	O
sources	O
suggest	O
an	O
operating	O
range	O
of	O
,	O
against	O
a	O
target	O
.	O
</s>
<s>
More	O
than	O
100	O
APG-77	B-Algorithm
AESA	B-Architecture
radars	I-Architecture
have	O
been	O
produced	O
to	O
date	O
by	O
Northrop	O
Grumman	O
,	O
and	O
much	O
of	O
the	O
technology	O
developed	O
for	O
the	O
APG-77	B-Algorithm
is	O
being	O
used	O
in	O
the	O
APG-81	B-Device
radar	O
for	O
the	O
F-35	O
Lightning	O
II	O
.	O
</s>
<s>
The	O
AN/APG	B-Algorithm
-77	I-Algorithm
system	O
itself	O
exhibits	O
a	O
very	O
low	O
radar	O
cross-section	O
,	O
supporting	O
the	O
F-22	B-Application
'	O
s	O
stealthy	O
design	O
.	O
</s>
<s>
The	O
APG-77v1	O
was	O
installed	O
on	O
F-22	B-Application
Raptors	I-Application
from	O
Lot	O
5	O
and	O
on	O
.	O
</s>
<s>
This	O
provided	O
full	O
air-to-ground	O
functionality	O
(	O
high-resolution	O
synthetic	B-Application
aperture	I-Application
radar	I-Application
mapping	O
,	O
ground	O
moving	O
target	O
indication	O
and	O
track	O
(	O
GMTI/GMTT	O
)	O
,	O
automatic	O
cueing	O
and	O
recognition	O
,	O
combat	O
identification	O
,	O
and	O
many	O
other	O
advanced	O
features	O
)	O
.	O
</s>
