<s>
Developed	O
from	O
the	O
Reeves	B-Device
AN/MSQ	I-Device
-35	I-Device
,	O
the	O
AN/MSQ	O
-77	O
reversed	O
the	O
process	O
of	O
Radar	O
Bomb	O
Scoring	O
by	O
continually	O
estimating	O
the	O
bomb	O
impact	O
point	O
before	O
bomb	O
release	O
with	O
a	O
vacuum	O
tube	O
ballistic	O
computer	O
.	O
</s>
<s>
Most	O
AN/MSQ	O
-77s	O
were	O
replaced	O
by	O
solid-state	O
equipment	O
near	O
the	O
end	O
of	O
the	O
Cold	B-Application
War	I-Application
.	O
</s>
<s>
Ground	O
radar	O
systems	O
for	O
automated	O
guidance	O
of	O
aircraft	O
to	O
a	O
predetermined	O
point	O
(	O
e.g.	O
,	O
for	O
bomb	O
release	O
using	O
a	O
bombsight	B-Application
or	O
avionics	O
radar	O
)	O
included	O
the	O
July	O
1951	O
AN/MPQ	O
-14	O
Radar	O
Course	O
Directing	O
Central	O
.	O
</s>
<s>
By	O
1954	O
the	O
MARC	O
(	O
Matador	O
Airborne	O
Radio	O
Control	O
)	O
used	O
the	O
AN/MSQ	O
-1A	O
for	O
missile	O
guidance	O
to	O
the	O
terminal	O
dive	O
point	O
,	O
and	O
SAGE	B-Device
GCI	I-Device
provided	O
computer-controlled	O
guidance	O
of	O
aircraft	O
to	O
continuously	O
computed	O
interception	O
points	O
(	O
1958	O
AN/FSQ	B-Device
-7	I-Device
Bomarc	O
missile	O
guidance	O
and	O
the	O
later	O
Ground	O
to	O
Air	O
Data	O
Link	O
Subsystem	O
for	O
fighters	O
)	O
.	O
</s>
<s>
LS-85	O
'	O
s	O
operations	O
ended	O
with	O
the	O
1968	O
Battle	O
of	O
Lima	O
Site	O
85	O
defeat	O
by	O
sappers	B-Language
after	O
North	O
Vietnam	O
had	O
correlated	O
bombings	O
were	O
occurring	O
during	O
LS-85	O
transmissions	O
(	O
the	O
site	O
's	O
central	O
and	O
other	O
buildings	O
were	O
destroyed	O
by	O
a	O
later	O
U.S.	O
air	O
raid	O
.	O
)	O
</s>
<s>
Following	O
-77	O
modifications	O
in	O
1968	O
,	O
subsequent	O
changes	O
included	O
a	O
solid-state	O
digital	O
printer	O
for	O
RBS	O
(	O
"	O
Digital	O
Data	O
System	O
"	O
)	O
and	O
implementation	O
of	O
a	O
USAF	O
suggestion	O
for	O
RBS	O
to	O
use	O
a	O
late-1970s	O
programmable	B-Application
calculator	I-Application
to	O
supersede	O
the	O
Bomb	O
Trajectory	O
Group	O
,	O
eliminating	O
alignment	O
procedures	O
for	O
its	O
amplifiers	O
.	O
</s>
<s>
Developed	O
from	O
the	O
AN/MSQ	O
-77	O
and	O
also	O
used	O
in	O
Vietnam	O
was	O
the	O
monopulse	B-Algorithm
India-band	B-Algorithm
Reeves	B-Architecture
AN/TSQ	I-Architecture
-96	I-Architecture
Bomb	I-Architecture
Directing	I-Architecture
Central	I-Architecture
with	O
a	O
solid	O
state	O
Univac	O
1219B	O
ballistic	O
computer	O
(	O
Mark	O
152	O
fire	O
control	O
computer	O
)	O
,	O
and	O
the	O
AN/MSQ-77/96	O
systems	O
for	O
GDB	O
were	O
replaced	O
by	O
the	O
US	O
Dynamics	O
AN/TPQ	O
-43	O
Radar	O
Bomb	O
Scoring	O
Set	O
(	O
"	O
Seek	O
Score	O
"	O
)	O
.	O
</s>
<s>
The	O
central	O
also	O
had	O
an	O
added	O
beacon	O
tracking	O
capability	O
used	O
when	O
the	O
aircraft	O
had	O
a	O
receiver/transmitter	O
(	O
e.g.	O
,	O
Motorola	O
SST-181	O
X	B-Algorithm
Band	I-Algorithm
Beacon	O
Transponder	O
)	O
to	O
increase	O
the	O
range	O
so	O
the	O
radar	O
site	O
could	O
be	O
located	O
farther	O
from	O
the	O
hostile	O
region	O
of	O
bombing	O
targets	O
.	O
</s>
<s>
The	O
integration	O
was	O
based	O
on	O
the	O
varying	O
aircraft	O
position	O
and	O
velocity	O
prior	O
to	O
the	O
bomb	O
release	O
,	O
so	O
as	O
with	O
the	O
use	O
of	O
the	O
Norden	B-Device
bombsight	I-Device
analog	O
computer	O
in	O
World	O
War	O
II	O
,	O
a	O
nearly	O
steady	O
bomb	O
run	O
was	O
required	O
for	O
the	O
AN/MSQ	O
-77	O
to	O
provide	O
sufficient	O
bombing	O
accuracy	O
.	O
</s>
<s>
With	O
the	O
computer	O
track	O
and	O
the	O
central	O
having	O
target	O
position	O
,	O
A/C	O
heading	O
,	O
&	O
bomb	O
type	O
information	O
;	O
and	O
with	O
the	O
Bomb	O
Trajectory	O
Group	O
's	O
servos	O
tracking	O
the	O
bomb-in-aircraft	O
course	O
and	O
pitch	O
,	O
the	O
operator	O
then	O
activated	O
the	O
BTG	O
integrators	O
for	O
the	O
computer	B-Application
simulation	I-Application
to	O
begin	O
integrating	O
a	O
bomb	O
trajectory	O
from	O
the	O
A/C	O
coordinates	O
at	O
that	O
integration	O
start	O
point	O
.	O
</s>
