NASA Taxonomy National Aeronautics and Space Administration nasa, united states, space, aeronautics 2011-12-31 2012-08-05 16:10:25 en Tracking and Data Relay SatelliteTDRS This system of satellites and ground stations makes up a
portion of the Space Network and provides mission services
for near Earth satellites and orbiting vehicles. 2011-04-20 15:28:16