That still takes takes time create a targeting solution and the only thing thing they are going to get is an ELINT hit off of radars with the lack of OPIR. OSINT sources however can be pretty deadly and help develop a good JDPI on a target pretty fast when you lack other ways of gathering exact data on a target. Not an expert on how the Patriots are laid out, but I’ve seen one or 2 IADS diagrams in my time and I’m gonna assume that the Patriots keep their radars away from their launches and the most intelligent way to conduct C2 of fires would be via a physical connect and nothing that emits RF.
Not discrediting what you have said by any means.

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Airports seem to be popular places to set them up. Need space between radar, control, launchers. Also heard zoos and parks mentioned, basically a place with a few football fields at least of unobstructed terrain. Limits locations in a city significantly, I'd imagine.