Countermeasure is trying to figure out how you are going to generate an EMP
on a moving target at FL300? Nuclear explosion? One a day or one every few
hours depending on how often I launch? No radar paint means that you can't
detect altitude, just azimuth.

Jim

--
"If you think you can, or think you can't, you're right."
--Henry Ford




EMP (you didn't mention cost ,feasibility, or collateral damage)

Your countermeasures:

????