Government scientists and military contractors have proposed all kinds of tricks to protect passenger planes from shoulder-fired missiles since 2002, when an Israeli 757 was attacked in Kenya. Laser dazzlers, microwave blasters, even chemical-powered ray guns have all made the list. According to the DD story (sorry folks, subscription only), Homeland Security’s plan involves placing a drone is a perpetual orbit over airports. It’s part of a broader science and technology effort called “Project Chloe.”
Under Chloe, the UAS [unammned aerial system] would loiter for a day at around 65,000 feet above an airport. At that altitude an unmanned aircraft would be above the National Airspace and not conflict with routine aircraft traffic managed by the Federal Aviation Administration.
The system would be equipped with a missile warning system and a DIRCM ["Directional InfraRed Counter-Measures," which use missile-confusing laser beams] to detect and defeat shoulder-fired missile threats, Cohen said. A higher powered laser would likely be needed than what is envisioned for commercial aircraft because of the high altitude, he said. Cohen also suggested that instead of blinding the missile’s seeker, a laser could be used to decoy it to a higher altitude where it would eventually run out of fuel.
[WIRED]