That's Khatamin Air Base, sometimes seen as Esfahan or Isfahan Air Base because of it's proximity to the city of Esfahan, home to F-4s and some army aviation units. If the image was higher resolution you'd be able to see an SA-5 site nearby as well as a CSA-1 (SA-2) battery.
Esfahan/Isfahan is a major weapons R & D and production area. See here: http://www.globalsecurity.org/wmd/world/iran/esfahan.htm