I thought about that too, but decided against it
a) it would give the impression that you could take the ion connon with you, which is not the case
b) it would cost me time, which is always in short supply.
You could also place a satelite launcher building to be able to launch satellites.
but that would be even more work.
So the radar is a compromise with the least effort ;-)
BTW you can remove the radar, after launch, it does not have to stay there permanently.