Hi, is it possible to center a location on a scanner sweep created by the terran comsat add-on?
I know its possible to detect a scanner sweep with the condition "Player X Commands at least 1 Scanner Sweep at Anywhere" and such... but center location always centers on the middle of the map

You can only detect that the player has a scanner sweep used as a detector. But that is not very accurate.
So I would suggest to say: It's possible, but you should think about a "no".

The best you can do is to set up a grid of Observers belonging to a computer, and when the Sweep goes off, give it to a player you know will not be allied with the computer who controls the the observers. Then create a bunch of Scourge and figure out where there are not Observers belonging to the computer.

Third time's a charm: no.