2.1 Version 4.8.0

1. The define_field_sampling command now uses the field interpolation routine to sample electric and magnetic fields, rather than simply taking fields from the problem grid. This means that all field components are included: (1) fields generated by antennae, (2) fields generated by the beam, (3) fields obtained from off-axis expansion, (3) fields obtained from electrostatic poentials, and (5) constant imposed fields. Previously, only 1 and 2 were represented in the output. The need for this was pointed out by P. Piot (NIU).
2. The define_field_sampling command now accepts “Ball” and “Eall” as field requests, meaning that all components of or are sampled.