The latest in the battle of jamming with electronic beams

Submission Statement

This article is the second in a series by the Economist focused on lessons learned from the Ukraine war. The articles are written for a layman audience, but even dedicated watchers can derive value from the interviews and novel information sprinkled throughout. I plan on posting them in sequence here, and the full set of 7 articles can be found here.

The war in Ukraine has put electronic warfare in the spotlight, not least because many of the measures and countermeasures being deployed are some of Russia’s most effective against NATO weaponry. This article provides an overview of those efforts, as well as NATO’s own work to defeat them. Most notable among those are the EW maps that NATO is apparently providing Ukraine 32 times a day–a form of aid I had not heard mention of before.

Shashank Joshi is The Economist‘s defence editor. Prior to joining The Economist in 2018, he served as Senior Research Fellow at the Royal United Services Institute (RUSI) and Research Associate at Oxford University’s Changing Character of War Programme.

Russian EW was “highly effective” in some areas, concludes the RUSI think-tank. Ukrainian jets initially found that their communications, navigation and radar were all disrupted and in some cases knocked out. The disruption to Excalibur has disturbed some Western officials. But Russia’s land and maritime capabilities have been “lacklustre”, argues Thomas Withingon, an expert analyst of EW. “Our [pre-war] assessment of Russian EW capability was at the pessimistic end of the range,” agrees Edward Stringer, a retired air marshal in Britain’s Royal Air Force. “Russian EW is eminently beatable.”

In truth, jamming is imperfect and intermittent. One reason is that EW systems are scarce. Russia has been forced to keep some at home to protect cities and bases. Another is that using them comes at a price. Big jammers emit a powerful signal, making them conspicuous targets. Russia has had to pull many of its best ones farther to the rear, says one official. This leaves gaps to exploit. America is providing Ukraine with cuts, or maps, of electromagnetic activity—essentially, the location of jamming and the frequencies used—32 times a day, says T.J. Holland of America’s XVIII Corps. That is a boon to Ukrainian drone operators.

GPS can also be supplemented with signals from communications satellites in low orbit (like Starlink), ground-based transmission sites (like Russia’s Loran system) and even magnetic-field navigation, suggests Mr. Goward. And as weapons increasingly morph into explosive computers, the line between EW and cyber-attacks is blurring. Andriy, the Ukrainian officer, says Ukraine often inserts malicious code into Russian drones mid-flight.

EW is ultimately a game of cat and mouse. Russia and Ukraine both seek “electromagnetic supremacy”, says Mr. Withington, but neither can achieve it for good. “Control will ebb and flow throughout the battle.” Jammers will find a way through; defenders will eventually plug the gap. America helped fix the problems with JDAM-ER by ensuring that the bombs acquired a good GPS signal before leaving the plane, according to leaked documents. Excalibur is now hitting its targets again, says a Western official. “In EW, things change very fast,” says Andriy. But the battle must be waged. “In this war, we see that if you do not dominate this domain, you will not be effective in other domains.”