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Fillius & Knickerbocker 1979
Fillius, W. and Knickerbocker, P. (1979). The phase of the ten-hour modulation in the jovan magnetosphere (Pioneers 10 and 11). Journal of Geophysical Research 84: doi: 10.1029/JA080i010p05763. issn: 0148-0227.

We have systematized and recorded our study of the phase of the 10-hour modulation of energetic electrons seen by Pioneers 10 and 11 in the Jovian magnetosphere. To start with, we focus on the peaks rather than the valleys of each cycle because th peaks are where physically interesting features occur, such as particle acceleration, current sheets, etc. To identify the peaks, we demand that the instantaneous intensity be higher than the 5-hour running average and the 5-hour running average be greater than the 10-hour running average. These criteria select an interval rather than a point and we feel that this interval is an appropriate estimate of the experimental uncertainty. When the phases of the peaks are plotted together, they create patterns which we discuss in terms of disk-like, clock-like, and rotating anomaly models of the magnetosphere. Each model fits some of the data, but no model explains all of the data convincingly. We conclude that we still do not understand the configuration of the outer Jovian magnetosphere.

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Journal
Journal of Geophysical Research
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American Geophysical Union
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