> Being able to test GPS jamming techniques against intact munitions isn't some hypothetical academic problem.

The US military-industrial complex is probably extremely grateful for the chance to do the same, here. Very useful if there's ever a direct conflict.

Excalibur, GLSDB, JDAM, and ATACMS all have GPS-aided inertial guidance and can be set to fall back to just inertial; the US has long been aware of the likelihood of GPS jamming in a hot war, and certainly plans to employ the same sort of jamming themselves against potential enemies.

I fully expect there's a lot of work being done on cheap anti-jammer drones that home in on a jammer's signal; it's like a big "come get me!" signal. We already have HARM missiles for radar for a similar purpose.