Image Library Select any of the following images to download a higher resolution version in a separate window. All images on this page have been released into the .A GPS satellite is a satellite used by the NAVSTAR Global Positioning System GPS . The first satellite in the system, Navstar , was launched . The .As of Global Positioning System navigation satellites have been launched not all remain operational. The minimum number of satellites for a full .The GPS is a space based global navigation satellite system GNSS that provides reliable positioning, navigation, and timing services to civilian and military users .