FRIEDRICH SAURER / SCIENCE PHOTO LIBRARY FRIEDRICH SAURER / SCIENCE PHOTO LIBRARY
GPS satellite. Computer artwork of a NAVSTAR (navigational signal timing and ranging) global positioning system (GPS) satellite in orbit around the earth. NAVSTAR is operated by the US Air Force for the US Department of Defence and orbits at 20,200 kilometres. The network of 28 satellites, 24 of which are active and 4 of which are spares, provides information to military and civilian users worldwide. Uses of GPS include car and ship guidance, vehicle tracking, mapping and reconnaissance, and search and rescue.
Model release not required. Property release not required.