Static Frequency (PIN-K0 Outpost)
Free the PIN-K0 outpost in northwestern Jacob-land, then speak to the local quest giver.
You need to destroy three satellite dishes. Turn around and climb to the top of the building north of you.
Enemy helicopters will start to roll in. You can snipe the pilots, or use the mounted gun here to down them.
There's one dish on this roof, but you can hit the other two from here.
The rocket launcher is ideal for this, though rifles, LMGs, and some well thrown explosives will also do the trick. Destroy all three dishes to complete the mission.
There may be a few last helos to mop up.