The area covered in question is over 200km2. Might be hard to imagine how much RF transmission/reception equipment we have in that space.
An attacker would need a lot of fairly powerful jamming equipment just to disrupt a small area of it. And our customer would advise us pretty quickly if their personnel were having reception issues and our field engineers would diagnose the source of the interference pretty quickly. So no.
Thanks for elaborating. Is there an extension to the protocol so it frequency hops once jammed?