WGS84 Earth model, Accuracy and Role in Aviation

The World Geodetic System WGS84 is the Globe Model implemented in GPS and is used not only by Google Earth and other map applications, but is also the model used for flight planing and aircraft navigation. It has cm accuracy worldwide. Using Wide Area Augmentation System WAAS it is used to fly thousands of km, even without visibility to the ground, to find the destination runway to m accurcy everywhere on earth.

I show how GPS and the WGS84 model is used in daily flight planing and navigation.