The Carnarvon Tracking Station in Western Australia was a tracking station built in 1963 for use by NASA for the Gemini program, the second step for NASA's plan to put a human on the Moon. It replaced the Muchea Tracking Station and used some of the equipment from Project Mercury. The Station also included an FPQ-6 precision tracking radar, a STADAN scientific satellite tracking facility, a planet Jupiter monitoring system, and a Solar Particle Alert Network (SPAN) facility. Together these facilities formed the largest station in the NASA network outside mainland USA.