AWACS - what do these antennas do?
The image below labels each of the antennas. To summarize based on your groupings:

A: Multi-Role Electronically Scanned Array (MESA) made by Northrup Grumman. It has a similar role to the large rotating dome on the E-3 in tracking airborne targets. Instead of being rotated mechanically, it can be electronically scanned.

B: Communications/Navigation, GPS, ELT (emergency locator transmitter)

C: Missile warning, infrared countermeasure

D: Electronic surveillance

E: Communications

F: Communications

G: Communications/Navigation

H: Missile warning, electronic surveillance



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