"Jorge R. Frank" writes:

I know it saved the bacon when lighting hit the launching stack, but
for example, how did it navigate? I see it had its own radar; I'm
guessing it interrogated ground transponders that let it calculate its
position to compare with the INS. Correct?

Not correct. It had an inertial platform (ST-124) and used inertial
navigation. There was no "external" source of position; the LVDC
computed position and velocity by integrating the acceleration from the
ST-124.

I'll add (of course) that the ground did perform tracking of the S-V and
could uplink a new state vector to the IU if the inertial navigation
system got too far off.

So what did it use the radar for?


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