ABSTRACT
One of the objects of a Numerical Electromagnetics Code-2 analysis is to calculate a close approximation of an array's driving point impedances when the array elements are in the active condition. A common practice is to attempt to adjust the parameters of the tower models such that the calculated self-impedances match, or nearly match, the measured self-impedance of the physical towers. This process is referred to as "modeling by measurement". Although it might not be essential to have an exact match between the calculated and measured self-impedance, there are occasions where some analysts may find it desirable to make parameter adjustments during calculations so as to force an acceptable comparison with measured data. Reasonable adjustments normally concern only discretionary parameters or parameters that must be estimated because they cannot be measured conveniently. Realistic adjustments are divided into two categories—those associated with the modeled tower and those associated with the measuring apparatus.
