[Justa]

OTOH, I think the Germans were intelligent enough to know how to read a map and use a compass and knew the V-1s capabilities well enough to do their own targeting.

[BRITinUSA]

Yes they did have that information, but what they did not have and could not compute was the distance that they travelled and that was a consequence of atmospheric conditions, wind, air temp etc.

This is why they relied so heavily on reports from spies who could tell them if they were falling short or going long.