Global Positioning System Satellites To Aid Artemis Lunar Missions 

NASA Intends To Use Signals From 24+ Operational GPS Satellites In 20,000-Km Earth Orbit With Receivers On Moon; GSFC Developing Lunar GPS Receiver Based Upon NavCube System Being Tested On ISS; JPL Scientists Kar-Ming Cheung (L) And Charles Lee (R) Estimate That GPS Allows Lunar Navigation With 200-300 Meter Accuracy; Navigation Could Be Improved With Small Relay Satellite In High Lunar Orbit

Credits: NASA, JPL