NASA’s SkyFall Mars helicopters will use flexible radar “capes” to hunt subsurface ice NASA’s SkyFall Mars helicopters will use flexible radar “capes” to hunt subsurface ice By Helene Elliott on August 8, 2026 NASA plans to launch three miniature rotorcraft to Mars in 2028, each equipped with a flexible antenna that resembles a tiny cape, to probe the planet’s shallow subsurface for water ice.