# GPS Satellites are Clocks GPS Satellites are just clocks. They are in known locations and they repeatedly send out very precise measurements of the time according to their on-board clock. GPS receivers like your phone read those times from at least 3 satellites and use the differences in the received time to determine path lengths to the satellites and triangulate their position. ![[Untitled-2023-12-30-2219.png]] **** ## Source - [[How We Got to Now]] ## Related - [[GPS]]