Electrical and Photon Tests of a Resonant Satellite Shape

A resonant body has been tested and analyzed to determine its SGEMP response. Both electrical and photon excitation were used and their results compare favorably with predictions. A modal analysis of the experimental data using Prony´s algorithm yielded the dominant frequencies, damping and excitation amplitudes. Within the accuracy of the measurements, the presence of the photon-induced electron cloud had no effect on the period or damping times of the RESMOD modes. The proximity of an electrical pulser and its 200-Ohm terminating resistor markedly decreased the damping time during electrical excitation.