Plans to give Ukraine JDAM-ERs with new seekers come as Western precision-guided munitions are reportedly suffering from Russian GPS jamming.
www.twz.com
Reading through the article, it would make a lot more sense to integrate a home-on-GPS jam seeker into an Excalibur 155mm guided shell than a JDAM-ER or SDB-II. If highly localized GPS jammers were easy to triangulate you’d already be taking them out with the equivalent of counter battery fire, not a homing head glide bomb. If the jammers were regional, like the big one in Kalingrad, it would be the job for something like AARGM. This solution seems as if it would require a fairly permissive air defense environment.
An anti-GPS jammer capability is going to be necessary for even non-peer expeditionary warfare going forward, with the illustration of generic cruise missiles from the 2018 brochure suggesting as much. It’s not an easy puzzle to solve because localized GPS jammers can potentially be quite numerous.