So the "trick" to location satellite systems is super accurate and stable atomic clocks. Each satellite basically pings a timestamp out and you derive your location from the difference in when you receive which ping from several satellites.<p>So the issue would be "how much more expensive is it going to be to equip these satellites with those clocks?" There might well be enough other uses for accurate clocks on these to make upgrading whatever they do have worth it. They might not be that expensive anymore.<p>Apologies for any misunderstandings im suffering here.