Michael Peck
Electronic warfare is a pervasive if less visible of the fighting between Russia and Ukraine.
Russia in particular has waged a major electronic-warfare campaign against Ukrainian forces.
Russian jamming seems to be affecting Ukraine's communications and US-provided weapons, experts say.
Russian jamming has become so effective that Ukraine — as well as the US and NATO — can no longer assume that Joint Direct Attack Munition glide bombs and other smart weapons will hit their targets.
That's the conclusion of an analysis by Britain's Royal United Services Institute. "Jamming is not causing the JDAMs to stop working, but it is risking their accuracy," according to RUSI researcher Thomas Withington.
While anti-jamming upgrades to JDAM may mitigate the problem, Russian electronic-warfare systems can simply drown out the GPS guidance signal from satellites. "The problem may well be the sheer power of the jamming signal that can be brought to bear," Withington said.
The warning comes after Pentagon documents leaked in April revealed concerns that Russian jamming was reducing the accuracy of American guided weapons, including JDAM as well as HIMARS rockets.
The effect on JDAM is particularly significant, as it is arguably the simplest and most cost-effective smart bomb. By attaching fins and a GPS guidance system to cheap, old-fashioned "dumb" bombs, Ukraine could produce long-range guided weapons at a fraction of the cost of special precision-guided munitions that are in short supply.



















