ABSTRACT
An antenna array is described to Numerical Electromagnetics Code (NEC)-2 as a series of straight wires whose locations are specified in terms of their end coordinates. To specify the end coordinates, NEC-2 uses the conventional spherical coordinate system commonly used in mathematics. The broadcaster identifies points in the geographical coordinate system by employing the compass heading and the distance from a given reference point. NEC-2 expects to receive XYZ coordinates. The X coordinate and the Z coordinate are specified the same by both NEC-2 and the broadcaster, so no change is required in specifying those two coordinates. The elevation angles differ only in definition. NEC-2 defines the zenith as 0 degrees and the broadcaster's convention is to define the horizon as 0 degrees. The simplest reconciliation is for the broadcaster to accept the NEC-2 definition.
