One of Pioneer's recent major engineering development programs was the recovery system for the 25,000 lb NASA X-38, the test vehicle for the now-cancelled International Space Station Crew Return Vehicle.  This unpowered lifting body was designed to safely return up to seven ill or injured astronauts from the Space Station.  Based on Pioneer's GPADS technology, the X-38 recovery system employed a 7,500 square foot (700 square meter) ram-air inflated parafoil, the largest parafoil in the world, controlled by an on-board guidance system. Using GPS satellite signals, the X-38 has flown autonomously to a flared touchdown on land with vertical velocities as little as 10 feet per second and within 300 feet of the intended target.