Tags: Artificialsatellite, Satellite.
USA-206 also GPS SVN-50 PRN-05 and NAVSTAR 64 and known before launch as GPS IIR-21 GPS IIRM-8 or GPS IIR-21(M) is an American navigation satellite which forms part of the Navstar Global Positioning System. It was the twenty-first and last Block IIR GPS satellite to be launched and the eighth to use the modernised IIRM configuration.GPS IIR-21 was built by Lockheed Martin based on the AS-4000 satellite bus with the navigation payload being built by ITT.
