Russia's jamming of American weapons in Ukraine is showing the US what it needs to be ready for in a future fight

Ukrainian troops fire with surface-to-surface rockets MLRS towards Russian positions at a front line in the eastern Ukrainian region of Donbas on June 7, 2022. ARIS MESSINIS/AFP via Getty Images

• Russia’s electronic warfare has repeatedly foiled American precision weapons in Ukraine. 
• These developments highlight the need for the US to develop solutions before any potential great-power conflict.
• Those could include different weapons, specific countermeasures, and the targeting of enemy jamming systems.

Russian electronic warfare has created problems for American-made precision weaponry in Ukraine, but Moscow is also showing its hand and telling the US what it needs solutions for to be ready for potential future fights.

Ukraine has employed US precision weapons, like the HIMARS-fired Guided Multiple Launch Rocket Systems and air-launched Joint Direct Attack Munitions, throughout the war, but widespread Russian electronic warfare is regularly diminishing the effectiveness of these weapons.

Lt. Gen. Antonio Aguto, who is serving as the commander of Security Assistance Group-Ukraine, addressed the problem in December 2023, noting that electronic warfare directed at some of the US’ “most precise capabilities is a challenge.” Other US officials have identified these issues as well, adding that the US and Ukraine were working on solutions.

Any fixes developed to effectively counter the challenge posed by electronic warfare won’t just benefit Ukraine. They’ll also help the US solve problems it has long been concerned about as it prepares for the possibility of great-power conflict.

Mark Cancian, a retired Marine Corps colonel and a senior advisor at the Center for Strategic and International Studies, explained to Business Insider that “the widespread GPS spoofing we see in Ukraine adds urgency to solving a problem DoD has long recognized: that wartime spoofing will reduce the effectiveness of its weapons.”

A Russian R-330Zh Zhitel electronic-warfare jamming station during an exercise in July 2018. Denis Abramov/Russian Defense Ministry via Mil.ru

Electronic warfare can be executed using cheap but effective technology, and both sides of the war are using it extensively. And these tactics are not used solely to foil precision-guided munitions. They can also be used to scramble the connection between an operator and a reconnaissance or strike drone.

Electronic warfare is a broad term that includes a variety of inexpensive options. Jamming is relatively straight-forward, Thomas Withington, an expert in electronic warfare and air defense and an associate fellow at the Royal United Services Institute, said, explaining to BI that it involves “blasting a GNSS receiver with noise to cause it to lose the position, navigation, and timing signal that it received from the satellite.”

Spoofing, on the other hand, involves sending false GNSS information to the weapon’s navigation system, sending it off course or trajectory. Jamming is easier and can be done with cheaper equipment and engineers, while spoofing is likely to be used in more specific instances, such as hiding locations from the enemy.

Both serve different purposes, but in either case, the effects can be deeply problematic for precision weaponry.

Ukraine has managed to adapt to the challenge, in some cases, by engaging in jamming of its own or locating Russian electronic warfare sites and destroying them. Relying on alternative systems that don’t depend on GPS or utilize other guidance systems, such as an inertial guidance system, helps bypass the problem. That’s not always an option though.

M142 HIMARS launches a rocket on Russian position on December 29, 2023, at an unspecified location, Ukraine. Global Images Ukraine via Getty Images

Within the Russian military, there has likely been increased interest in employing electronic warfare in battle, especially over the past year or so, because it’s so effective at countering US-provided precision weapons.

Precision systems — like Excalibur and GMLRS, which can be fired from US-provided M777 howitzers and HIMARS, respectively — are seeing shockingly decreased accuracy due to jamming.

“The philosophy behind weapons like Excalibur and JDAMs was that their reliance on GNSS, to an extent, was supposed to provide a level of precision,” Withington told BI.

The capability and accuracy of those much-vaunted weapons are now in question, he said, noting that “not only has tactical and operational ramifications for the Ukrainians,” but it also potentially raises questions about “the wider confidence others have in those systems.”

Daniel Patt, a senior fellow at the Hudson Institute, told Congress back in March the 155mm GPS-guided Excalibur artillery shell “had a 70% efficiency rate hitting targets when first used in Ukraine” but “after six weeks, efficiency declined to only 6% as the Russians adapted their electronic-warfare systems to counter it.”

Patt added that “the peak efficiency of a new weapon system is only about two weeks before countermeasures emerge.” That is valuable information for the US as it prepares for potential future fights.

2000 lbs GBU-31 Joint Direct Attack Munitions (JDAM) are transported to the flight deck of USS Harry S. Truman (CVN-75). US Navy

The war in Ukraine has, as a defense expert previously told BI, been an “intelligence bonanza” and is giving the US an opportunity to learn how its precision weapons perform under modern threats like electronic warfare. It’s not theoretical. Instead, the US is watching a rival power engage its weapons in a real war.

Intelligence from the war builds on and likely advances years of research and discussion among US defense officials and experts about how electronic warfare will impact America’s arsenal in a great power conflict and how the US will need to adapt.

Cancian said DoD has been working on overcoming these threats by focusing on options like using narrower signal bands or the generation of stronger signals that are able to burn through jamming attempts.

The threats, nevertheless, “remind us to be careful about expecting ‘game changers,’ though,” he said. “The other side always develops countermeasures that reduce effectiveness.”

Despite the challenges, the US shouldn’t completely write off its precision weapons should it one day find itself in a war with another great power, be it Russia or China, which would almost certainly employ electronic warfare as well.

Withington said that “even if that jamming has been quite successful, the tactical imperative behind this is to work out a way to outflank the effectiveness of that electronic attack,” noting that while a strong Russian jamming signal may be effective, it’s also easier to detect and destroy.

At a media event earlier this month, Doug Bush, the Army’s acquisition chief, said it wasn’t surprising Russia was able to jam US weapons. He said it was part of a “constant cycle” of innovation on both sides, adding that the US was learning that “with any precision weapon, you want multiple ways to guide it to its target.”

For some weapons, that’s already in the works. Earlier this week, the US Air Force announced a contract for add-on seekers for its extended-range JDAMs, the goal being to improve the JDAM to resist electronic jamming and instead lock onto the source of the jamming, targeting it.

Bush said the Army had created a team focused on adapting its weapons to electronic warfare issues long before the war in Ukraine, signaling the Pentagon’s clear understanding of the problem these capabilities pose.

Bush previously said in August 2023 that the Army was “fundamentally reinvesting in rebuilding our tactical electronic-warfare capability after that largely left the force over the last 20 years” and that the war in Ukraine had added “urgency” to those efforts.

US Army electronic-warfare specialists set up portable packs capable of picking up and jamming enemy frequencies at Fort Bliss in Texas in December 2018. Staff Sgt. Felicia Jagdatt

Efforts to adapt precision weapons to the threat is just one facet of a multi-layered solution, Withington said. Other solutions to the problem involve using other weapons and prioritizing targeting the point of origin for electronic warfare signals early in a conflict.

“It is imperative that forces like the US and its allies see future battle in a case that they have to first establish electromagnetic superiority,” he said, explaining that denying enemies from using the electromagnetic spectrum in any way would “massively degrade at the very least, if not prevent altogether” an enemy from interfering with its weapons.

Ultimately, though, as the US and Ukraine adjust to Russia’s jamming and learn from the war, the “constant cycle” of innovation, as Bush said, will continue.

“The measure, counter-measure, counter-countermeasure that we’re seeing in Ukraine is typical in war,” Cancian said, adding that there is “no technology provides the ultimate advantage.”

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