Copyright © Klaus Piontzik  
German Version 
The corrected basic frequency allows a back calculation for the earth's radius. Rearranging the equation for the basic frequency is: 
=========> 
The following values were used for the variable c, f_{o}
f_{o} = 11.7921591 Hz = Earth basic frequency c = 299792458 m/s as speed of light The radius is: 
3.2.1  Definition:  R = 6355758.426 m = L_{0} = Basic hull 
The comparison with the geodetic reference system WGS84 shows: 
Polar radius:  6356752 m 
Equator radius:  6378137 m 
The basic envelope on which the zero lines and extrema (source points)
lie is located at a radius between one and twenty kilometers below the earth's surface.

3.2.2  Definition:  Earth oscillation structure = Sum of all possible spatial grids 
200 sides, 23 of them in color 154 pictures 38 tables Production und Publishing: ISBN 9783735738547 Price: 25 Euro 
