Overview of the high-frequency electric and magnetic fields around the high M_A interplanetary shock. (a) Background magnetic field from the MAG instrument. (b) RPW-LFR electric field measurements. Components are in the plane of the antennas. (c) RPW-LFR electric field PSD spectrogram. (d) RPW-LFR/SCM magnetic field in SRF coordinates. (e) RPW-LFR/SCM magnetic field spectrogram. (f) RPW-LFR/SCM magnetic field ellipticity. The lower hybrid frequency (f_lh) and electron cyclotron frequency (f_ce) curves are plotted in red and black, respectively, in panels (c), (e), and (f).