Precision Guidance Kit (PGK) in GPS‑Degraded Environments: Anti‑Jam, M‑Code, and 155 mm Artillery
The problem: GPS guidance under fire Wartime experience has shown that adversaries can degrade or even neutralize GPS‑guided munitions with robust electronic warfare. In 2024 reporting, Ukrainian assessments described U.S. satellite‑guided weapons losing effectiveness against Russian jamming; deliveries of some Excalibur shells
