Now in its third generation, KrattWorks’ Ghost Dragon ISR quadcopter has come a long way since 2022:
Its original command-and-control-band radio was quickly replaced with a smart frequency-hopping system that constantly scans the available spectrum, looking for bands that aren’t jammed. It allows operators to switch among six radio-frequency bands to maintain control and also send back video even in the face of hostile jamming.
The drone’s dual-band satellite-navigation receiver can switch among the four main satellite positioning services: GPS, Galileo, China’s BeiDou, and Russia’s GLONASS. It’s been augmented with a spoof-proof algorithm that compares the satellite-navigation input with data from onboard sensors. The system provides protection against sophisticated spoofing attacks that attempt to trick drones into self-destruction by persuading them they’re flying at a much higher altitude than they actually are.
At the heart of the quadcopter’s matte grey body is a machine-vision-enabled computer running a 1-gigahertz Arm processor that provides the Ghost Dragon with its latest superpower: the ability to navigate autonomously, without access to any global navigation satellite system (GNSS). To do that, the computer runs a neural network that, like an old-fashioned traveler, compares views of landmarks with positions on a map to determine its position. More precisely, the drone uses real-time views from a downward-facing optical camera, comparing them against stored satellite images, to determine its position.
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Russia took an unexpected step starting in early 2024, deploying hard-wired drones fitted with spools of optical fiber. Like a twisted variation on a child’s kite, the lethal UAVs can venture 20 or more kilometers away from the controller, the hair-thin fiber floating behind them, providing an unjammable connection.
“Right now, there is no protection against fiber-optic drones,” Vadym Burukin, cofounder of the Ukrainian drone startup Huless, tells IEEE Spectrum. “The Russians scaled this solution pretty fast, and now they are saturating the battle front with these drones. It’s a huge problem for Ukraine.”
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This past July, kamikaze drones equipped with an autonomous navigation system from U.S. supplier Auterion destroyed a column of Russian tanks fitted with jamming devices.
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But purchasing Western equipment is, in the long term, not affordable for Ukraine, a country with a per capita GDP of US $5,760—much lower than the European average of $38,270. Fortunately, Ukraine can tap its engineering workforce, which is among the largest in Europe. Before the war, Ukraine was a go-to place for Western companies looking to set up IT- and software-development centers. Many of these workers have since joined Ukraine’s DIY military-technician (“miltech”) development movement.
Very cool.