How GPS Works

Top Glossary Terms

• almanac data
• ephemeris data
• WAAS
• EGNOS
• Navstar

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Frequently Asked Questions

What is ______? (see Glossary)

How GPS Works

How does GPS "triangulation" work?

How does a GPS receiver figure its distance from a GPS satellite?

What is the orbital altitude of GPS satellites?

Are GPS satellites in geostationary orbits?

See Also

• Glossary
• Other GPS Web Sites