This dataset contains naturally occurring electric field power spectral density obtained when WHISPER sounder is in passive on Cluster 4. The data file also includes : the number of frequency bins of the Fast Fourier Transform, the receiving antenna used, Ey or Ez (respectively expression TBD in body build coordinates), the centre frequencies of the 512 bins in the frequency range 1.953 to 79.915 kHz (in the metadata), a flag, normally 0 (default value), which...