This data set contains the Cluster 3 WHISPER Prime Parameters : the electron density and plasma wave spectral density integrated over the frequency range, plus the status of operations. Caveats The WHISPER sounders operate on a duty cycle, so the electron density is sampled on neither a continuous nor a constant basis. This duty cycle covers situations from continuous active modes with one sounding occurring typically every 1-3 seconds, to natural mode operation only when...