What is a satellite navigation system?
Q: What is a satellite navigation system?
A: A satellite navigation or satnav system is a way of pinpointing position very exactly.
Q: How does a satnav system work?
A: Satnav uses a system of satellites. The system gives exact positioning by using time signals transmitted along a straight line (line of sight) by radio from satellites.
Q: What kind of receivers are required for using a satnav system?
A: Small electronic receivers are required for using a satnav system.
Q: What information can be obtained from a satnav system?
A: The position (longitude, latitude, and altitude/elevation) and current local time to high precision can be obtained from a satnav system.
Q: What is a global navigation satellite system (GNSS)?
A: A satellite navigation system with global coverage may be called a global navigation satellite system (GNSS).
Q: Which is the biggest and most used GNSS?
A: The Global Positioning System or GPS is the biggest and most used GNSS.
Q: Which countries or regions are working on similar systems of their own?
A: China, India, and the European Union are working on similar systems of their own.
