How does GPS communicate with satellite?

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Tags

1. #receive
2. #transmit
3. #outdoors
4. #receiver
5. #effectively
6. #require
7. #these
8. #signals
9. #satellite
10. #current
11. #location
12. #receivers
13. #satellites
14. #indicates
15. #unobstructed
16. #passively
17. #transmits