M0DTS VLF Rx in IO94IL 54.5N,1.29W - (DK7FC design) E-field Probe at 6m above ground
VLF Spectrograms for 8.27KHz 200uHz resolution, 15min overlap at 5min intervals. You may have to use Shift-F5 to refresh correctly.
60min overlap and 15min interval:
