Tags: Artificialsatellite, Satellite.
USA-1 also known as Navstar 9 GPS I-9 and GPS SVN-9 was an American navigation satellite launched in 1984 as part of the Global Positioning System development programme. It was the ninth of eleven Block I GPS satellites to be launched and the first satellite to receive a USA designation.USA-1 was launched at 11:37 UTC on 13 June 1984 atop an Atlas E/F carrier rocket with an SGS-2 upper stage. The Atlas used had the serial number 42E and was originally built as an Atlas E.