DRAGONSat
DRAGONSat (Dual RF Astrodynamic GPS Orbital Navigator Satellite) was a 2000s pair of nanosatellites that were to demonstrate autonomous rendezvous and docking (ARD) in low Earth orbit (LEO) for NASA. It was intended to gather flight data with a global positioning system (GPS) receiver strictly designed for space applications to gather flight data in the space environment. ARD is the capability of two independent spacecraft to rendezvous in orbit and dock without crew intervention.