Tags: Artificialsatellite, Satellite.
OPS 5111 also known as Navstar 1 NDS-1 GPS I-1 and GPS SVN-1 was an American navigation satellite launched in 1978 as part of the Global Positioning System development programme. It was the first GPS satellite to be launched and one of eleven Block I demonstration satellites.OPS 5111 was launched at 23:44 UTC on 22 February 1978 atop an Atlas E/F carrier rocket with an SGS-1 upper stage. The Atlas used had the serial number 64F and was originally built as an Atlas F.