I did wonder!The whole point of an AWACS is that it doesn’t need to be “in“ a particular airspace to give situational awareness to the commanders. Radar works by line of sight. The range of a radars horizon roughly is proportional to the square root of the antenna height. If you put a radar on an aircraft flying at 35000 ft, then you’re looking at over 250 Nautical miles for currently operated AWACS units.
Thanks for explaining it. So NATO could have two or three AWACs up at a time to the west and south of Ukraine, providing fairly extensive realtime fighter control across a decent portion of the battlespace while still being safely in Romanian airspace?