by DAVID AXE
These days the U.S. military relies on Global Positioning System satellites to figure out where everybody is, and where to drop bombs. The cheap and accurate, GPS-guided Joint Direct Attack Munition is our weapon-of-choice.
But what happens when the bad guys jam your GPS? Testing air attacks in an “anti-GPS” environment is one of the motivations behind the Air Force’s “Combat Hammer” bombing exercises in Utah. At a recent Combat Hammer, supersonic F-22s dropped JDAMS, pictured, and MQ-9 Reaper drones also attacked targets, despite GPS jamming.
How did they do it? You can add a laser-guidance kit to JDAMs, just in case. And there’s also the Air Force’s “Integrated Anti-Jam GPS System.” Basically, you design GPS receivers to switch between several frequency bands to evade jamming.
(Photo: Air Force)