I'm open to correction here though.
By no means a correction, but it's not too much of a stretch to imagine that there has been some 'exchange of information' between Iran and other regimes not entirely friendly towards 'The West'.
Russia, China, spring to mind.
Israel has been widely reported as having provided clandestine support to Iran throughout the Iran-Iraq war, perhaps as late as the mid 80s.
Whether any of this 'support', imagined or otherwise, could make AWG-9 partially Air-Ground capable is moot, perhaps the Iranians have replaced it with a different unit. Fairly sure any int. on this wouldn't be revealed in any case.