gd1.pp

gd1.pp is the postprocessor. gd1.pp loads the data that were computed by gd1 and displays them. gd1.pp also computes integrals over the fields, like wall losses and voltages. Together with the macro facility, this allows easy computation of figures of merit like Q-values and shunt-impedances.
A special section (-sparameter) computes scattering parameters from the amplitudes of port-modes that were computed and stored by gd1.
Wakepotentials and impedances are computed in the section -wakes.
TouchStone-files containing scattering matrices may be created in the section -totouchstone.

Before you can do anything useful, you have to specify from what database gd1.pp shall take the fields from. Therefore the first thing you do is: enter the section -general.