Paul kgyy wrote:
A HARM missile tuned into the jammer's frequency would be a pretty
effective deterent...

Well, any terrorist worthy of the name would locate the jammer on the
roof of a hospital or school...


Build about a dozen jammers and then launch them on weather
balloons or magnetic mount them on the side of trains or trucks.

A DF is useless against a moving target. GPS jamming is one
reason ILS and DME will never go away. Not in my lifetime.