<s>
The	O
AN/APG	B-Algorithm
-65	I-Algorithm
and	O
AN/APG	B-Algorithm
-73	I-Algorithm
are	O
designations	O
for	O
a	O
family	O
of	O
all-weather	O
multimode	O
airborne	O
radar	O
systems	O
designed	O
by	O
Hughes	O
Aircraft	O
(	O
now	O
Raytheon	O
)	O
for	O
the	O
F/A	O
-18	O
Hornet	O
,	O
and	O
used	O
on	O
a	O
variety	O
of	O
fighter	O
aircraft	O
types	O
.	O
</s>
<s>
The	O
APG-79	O
is	O
an	O
upgraded	O
AESA	B-Architecture
version	O
.	O
</s>
<s>
These	O
I	B-Algorithm
band	I-Algorithm
(	O
8	O
to	O
12	O
GHz	O
)	O
pulse-Doppler	B-Algorithm
radar	I-Algorithm
systems	O
are	O
designed	O
for	O
both	O
air-to-air	O
and	O
air-to-surface	O
missions	O
.	O
</s>
<s>
For	O
air-to-air	O
operations	O
they	O
incorporate	O
a	O
variety	O
of	O
search	O
,	O
track	O
and	O
track-while-scan	B-Algorithm
modes	I-Algorithm
to	O
give	O
the	O
pilot	O
a	O
complete	O
look-down/shoot	O
-down	O
capability	O
.	O
</s>
<s>
Air-to-surface	O
modes	O
include	O
Doppler	O
beam	O
sharpened	O
sector	O
and	O
patch	O
mapping	O
,	O
medium	O
range	O
synthetic	B-Application
aperture	I-Application
radar	I-Application
,	O
fixed	O
and	O
moving	O
ground	O
target	O
track	O
and	O
sea	O
surface	O
search	O
.	O
</s>
<s>
The	O
radar	O
includes	O
a	O
velocity	O
search	O
(	O
to	O
provide	O
maximum	O
detection	O
range	O
capability	O
against	O
nose	O
aspect	O
targets	O
)	O
,	O
range-while-search	O
(	O
to	O
detect	O
all-aspect	O
targets	O
)	O
,	O
track-while-scan	B-Algorithm
(	O
which	O
,	O
when	O
combined	O
with	O
an	O
autonomous	O
missile	O
such	O
as	O
AIM-120	O
,	O
gives	O
the	O
aircraft	O
a	O
fire-and-forget	O
capability	O
)	O
,	O
single	O
target	O
track	O
,	O
gun	O
director	O
and	O
raid	O
assessment	O
(	O
which	O
enables	O
the	O
operator	O
to	O
expand	O
the	O
region	O
centred	O
on	O
a	O
single	O
tracked	O
target	O
,	O
permitting	O
radar	O
separation	O
of	O
closely	O
spaced	O
targets	O
)	O
operating	O
modes	O
.	O
</s>
<s>
To	O
reduce	O
production	O
costs	O
,	O
many	O
of	O
the	O
upgraded	O
radar	O
's	O
modules	O
are	O
common	O
with	O
the	O
APG-70	O
(	O
F-15E	O
Strike	O
Eagle	O
)	O
radar	O
;	O
its	O
software	O
engineers	O
chose	O
the	O
JOVIAL	B-Language
programming	I-Language
language	I-Language
so	O
that	O
they	O
could	O
borrow	O
and	O
adapt	O
existing	O
software	O
written	O
for	O
the	O
APG-70	O
.	O
</s>
<s>
Since	O
1992	O
the	O
APG-73	O
has	O
been	O
operational	O
in	O
U.S.	O
Navy	O
and	O
Marine	O
Corps	O
F/A	O
-18C	O
and	O
D	O
aircraft	O
;	O
early	O
models	O
of	O
the	O
U.S.	O
Navy	O
F/A-18E/F	O
Super	O
Hornet	O
;	O
and	O
in	O
the	O
air	O
forces	O
of	O
Finland	O
,	O
Switzerland	B-Protocol
,	O
Malaysia	O
,	O
Canada	O
,	O
and	O
Australia	O
.	O
</s>
