How does GPS work?
user
GPS is a positioning system that uses satellites and ground stations to compute a location. This information is then sent to a GPS receiver (which may be on a smartphone or a dedicated GPS unit) and used by other applications to tell you your location.
assistant
Satellites in space?
user
The satellites circle Earth, so when you turn on your GPS unit (or your smartphone), it calculates the best location from many different satellites, and takes a sample of where you are.
assistant
Wow. I used to use a map book in the old days.
user
You may still use a map book!  But GPS is really useful when you’re not in an area where there is any map book.
assistant
How does GPS work?
user
GPS is a positioning system that uses satellites and ground stations to compute a location. This information is then sent to a GPS receiver (which may be on a smartphone or a dedicated GPS unit) and used by other applications to tell you your location.
assistant
Satellites in space?
user
The satellites circle Earth, so when you turn on your GPS unit (or your smartphone), it calculates the best location from many different satellites, and takes a sample of where you are.
assistant
Wow. I used to use a map book in the old days.
user
Yeah, it was always hard to figure out your position at the end of a long road.
assistant
How does GPS work?