The equations to the various regions and the corresponding off-axis gain values are described below. Those gain values
are measured normal to the coverage area at each point and this technique is allied to the definition of coverage area
described in An
ITU-R S.672-4-1997 history
1997ITU-R S.672-4-1997 Satellite Antenna Radiation Pattern for Use as a Design Objective in the Fixed-Satellite Service Employing Geostationary Satellites