\<COLOUR 1> LAUNCH DATE: \<COLOUR 0> February 22, 1978
\<COLOUR 1> LAUNCH SITE: \<COLOUR 0> Vandenberg Air Force Base, California
\<COLOUR 1> LAUNCH VEHICLE: \<COLOUR 0> Atlas F
\<COLOUR 1> ORBIT: \<COLOUR 0> 20,095/20,308 km
\<COLOUR 1> SIZE: \<COLOUR 0> Cylinder, width across solar arrays - 5.3 metres
\<COLOUR 1> WEIGHT: \<COLOUR 0> 871 kg
\<COLOUR 1> COUNTRY: \<COLOUR 0> USA
\<COLOUR 1> COMMENTS: \<COLOUR 0> The first (Block 1) satellite navigation (Navstar) satellites; 11 of this type are launched, the last on October 9, 1985, being superseded by the heavier Block 2 type; satellites deployed to form the global positioning system (GPS) for accurate land, sea and air navigation.