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Sitemap - The contents
How the GPS-System came to life.
A short description of the System and what satellites are part of the GPS-System. How do they look like, what capabilities do they have, whats the cost of a GPS satellite.
Where are the GPS satellites and how do they circle around the earth. Learn why are they set up in a sophisticated kind of way and how takes care of them.
The monitor stations and the GPS control segment. How the GPS system is kept working in a perfect way.
How a receiver determines it's position by measuring the run times of the signals sent out by the satellites. This is called trilateration.
What frequencies does the GPS-system use and what kind of signals are transmitted.
How are the GPS signals composed and what data are transmitted.
How the runtime of the signals is determined and how distance to the satellite is calculated from this information.
What effects do cause errors in the position determination by GPS and how large is this error.
How good is GPS really. What accuracy is achievable.
How the SBAS systems WAAS and EGNOS improve the GPS-system even more.
How the Earth's longitude and latitude system works.
The structure, composition and fucntion of the Earth's Atmosphere.