A Skyfront Perimeter drone takes off from the Alyeska trans-Alaska pipeline right of way near Fox for a milestone flight beyond the operator’s visual line of sight. The drone flew 3.87 miles along the pipeline corridor. (University of Alaska Photo / Sean Tevebaugh) A public-private consortium led by the University of Alaska has conducted the first-ever federally authorized test flight of a drone beyond the operator’s line of sight without on-the-ground observers keeping watch – with Echodyne, the radar venture that’s backed by Microsoft co-founder Bill Gates and headquartered in Kirkland, Wash., playing a supporting role. Autonomous flight beyond visual line of sight will be key to the kinds of drone delivery operations envisioned by Amazon, Walmart and other retailers. During Wednesday’s flight, a multirotor drone as part of the University of Alaska’s Unmanned Aircraft Systems Integration Pilot Program, from the Federal Aviation Administration last year. The big thing about this flight is that the drone made use of , paired up with Echodyne’s ground-based MESA airspace management radar system, without having a human on the route. Current FAA regulations limit drone flights to the operator’s visual line of sight. Pilot projects have been experimenting with technologies that can ensure safe operations beyond the visual line of sight, known as BVLOS. But until now, the FAA’s waivers still required a ground-based observer to look out for non-cooperative aircraft coming into the test area. This week’s flight of a drone totally on its own was authorized after it flew the same route with visual observers. “The test mission designed by the team at the University of Alaska at Fairbanks is an excellent demonstration of the potential for commercial UAS,” Eben Frankenberg, the founder and CEO of Echodyne, . “With Iris Automation and Echodyne sensor technologies, routine commercial missions like linear inspection and medical deliveries to remote communities are both practical and safe.” The radar system developed by Echodyne relies on metamaterials technology, which uses specially structured electronics to bend electromagnetic waves. Circuits based on metamaterials can allow for the construction of flat-panel radar devices that match the performance of larger, more expensive phased array antennas. Echodyne is one of several metamaterials-based startups that have been spun out from Bellevue, Wash.-based Intellectual Ventures with Gates’ financial backing. Its most recently reported funding round from Gates as well as Silicon Valley’s New Enterprise Associates, the Kresge Foundation, Lux Capital, Seattle’s Madrona Venture Group and Vulcan Capital. The company is playing a role in several tests of detect-and-avoid technologies for drones. In March, Echodyne announced that its as part of NASA’s UAS Traffic Management program, in Texas and Nevada. Meanwhile, the tests in Alaska will continue, focusing on pipeline inspection as well as other applications potentially including medical device delivery, search and rescue, road monitoring and surveys of fish and wildlife.