Wifi mesh makes sense in a densely populated area, not over mostly desert.

Also, communication over longer distances (even few km) will add so much latency that it will be unusable for coordinated AA targeting.

Furthermore, all that radiating will just invite bombs from the attacker.

Maybe I was not clear enough about the goal: not "robust command and control communication network", but more of:

quickly and temporarily set up a high-bandwidth low latency communication network to accomplish AA ambush using coordinated mobile passive sensors (a quick radar burst might for initial acquisition might be useful, but probably not necessary).