There should not be any Boeing 707-based AWACS planes (E-3 Sentry) in Iran, because Imperial Iran never recieved the Sentrys they ordered due to revolution and only AWACS Iraq had was the Il-76-based one-off prototype (Adnan?).
I didn't find any references to Iran obtaining Sentry from the normal sources. This is really a mystery plane - could it be a mockup perhaps?
BTW. It seems to have all four engines, the engine cover is discolored.
You are right - almost. The engines are closer to the body and also closer together. The paint scheme close to the E-3 (the stripe on radome), which confused me along the location of radome, which is farther back (but not as far) as in E-3.
But this is not an actual A-50, but one of the two remaining Iraqi-built Il-76-based variants called "Adnan 1", where the radar technology is provided by Thomson (France).
I didn't find any references to Iran obtaining Sentry from the normal sources. This is really a mystery plane - could it be a mockup perhaps?
BTW. It seems to have all four engines, the engine cover is discolored.
http://en.wikipedia.org/wiki/Beriev_A-50_Mainstay
But this is not an actual A-50, but one of the two remaining Iraqi-built Il-76-based variants called "Adnan 1", where the radar technology is provided by Thomson (France).
More info below "Known variants":
http://www.aerospaceweb.org/aircraft/recon/a50/