Studies of some statistics of the interplanetary magnetic field and implications for discrete modes

We present some results from a statistical study of the levels of the power spectrum of the interplanetary magnetic field as measured by the Ulysses spacecraft near the ecliptic plane between 1 and 5 AU. We conclude from the studies of the probability distributions of the power spectral levels that the interplanetary medium is not totally chaotic, but can sustain high percentages (21% to 30% for the examples shown here) of discrete, low frequency modes, probably of solar origin, over a long interval of time.