Both sides are waging a battle to jam the electronics of missiles and other weapons.
Clark told the BBC that Russian technologies were able to jam missile GPS coordinates, disable Ukrainian drones, and suppress Russian radar signals that were used by Ukraine to identify targets to attack.
Like many long-range missiles, they rely on GPS coordinates to be guided to their target.
They have a greater range than the HIMARs long-range missiles that Ukraine used to drive back Russian forces in a counteroffensive last year, The Defense Post reported.
They were also one of a number of weapons that Ukraine's Western allies hoped could help Ukraine in its new counteroffensive to drive back Russian invaders.
Persons:
Bryan Clark, Clark, Mr Clark, It's
Organizations:
Service, Hudson Institute, BBC News, BBC, Royal United Services Institute, Defense
Locations:
Russia, Ukrainian, Wall, Silicon, US, Ukraine