If they breathlessly announced they were dismantling one of our howitzers, we'd joke about them being 60 years behind. It doesn't mean those howitzers aren't useful weapons, but...
US-made weapons augmented by Global Positioning System (GPS) satellites for position updates in Ukraine are now susceptible to Russian electronic warfare (EW) jamming ... The weapons affected may include the 155mm Excalibur artillery projectiles, Ground Launched Small Diameter Bomb (GLSDB), Joint Direct Attack Munition (JDAM) and weapons rounds used with the High Mobility Artillery Rocket System (HIMARS), among others, depending on how they are employed by the weapons operators.
An unnamed source reportedly familiar with the classified report told the NYT that in the worst-case scenario, only one in 19 Excalibur rounds was hitting its target, where the report said the cost per successful strike skyrocketed from $300,000 to $1.9 million between January and August 2023.
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.
Or when Russians appears to have lost a jamming pod above Ukraine [1] Again bleeding edge EW tech which Russia just lost.
[0] https://mil.in.ua/en/news/russians-use-bombs-equipped-with-e...
[1] https://www.twz.com/ukraine-just-captured-one-of-russias-mos...
There are definitely many ways to make those jammers disappear. Ukraine will inevitably find a way to do it on the cheap.
If Ukraine is just leaving the GPS guidance turned off entirely and relying on inertial guidance, then whatever secrets Russia has discovered in ATACMS really are academic.