Asset Details

  • Description:
  • Ionospheric current per radian of azimuth and field‐aligned current density profiles derived from the azimuthal magnetic field data shown in Figure e for category A Rev 287. As in Figure , the vertical lines indicate the locations/times where the magnetic field lines map to the outer edge of the A ring (red dashed lines) and the outer (blue solid lines) and inner (blue dashed lines) edges of the D ring. Figure a shows the ionospheric meridional current, Im (MA/rad), positive northward, plotted versus ionospheric colatitude, θi (deg), measured from the northern pole. The black line shows the value calculated directly from the 10‐s field data using equation , while the purple line shows the smoothed profile using a sliding 2.5‐min window. The blue and red lines show the northern profile mapped along field lines into the southern hemisphere and the southern profile mapped along field lines to the northern hemisphere, respectively. In Figure b, the black line shows the field‐aligned current density just above the conducting layer of the ionosphere, positive along the background field direction, calculated from the gradient of the smoothed ionospheric current profile using equation . The blue line shows the northern current density profile mapped along field lines into the southern hemisphere, while the red line shows the southern current density profile mapped into the northern hemisphere. Figure c shows the current density local to the spacecraft as a function of time relative to the field parallel point.
  • License:
  • Rights Managed
  • Rights Holder:
  • John Wiley & Sons, Inc.
  • License Rights Holder:
  • ©2019. American Geophysical Union. All Rights Reserved.
  • Asset Type:
  • Image
  • Asset Subtype:
  • Image Orientation:
  • Portrait
  • Image Dimensions:
  • 2128 x 2772
  • Image File Size:
  • 16.9 MB
  • Creator:
  • G.J. Hunt, S.W.H. Cowley, G. Provan, H. Cao, E.J. Bunce, M.K. Dougherty, D.J. Southwood
  • Credit:
  • Hunt, G. J., Cowley, S. W. H., Provan, G., Cao, H., Bunce, E. J., Dougherty, M. K., & Southwood, D. J. (2019). Currents Associated With Saturn's Intra‐D Ring Azimuthal Field Perturbations. Journal of Geophysical Research: Space Physics, 124(7), 5675-5691. https://doi.org/10.1029/2019JA026588.
  • Collection:
  • Keywords:
  • Restrictions:
  • Property Release:
  • No
  • Model Release:
  • No
  • Purchasable:
  • Yes
  • Sensitive Materials:
  • No
  • Article Authors:
  • G.J. Hunt, S.W.H. Cowley, G. Provan, H. Cao, E.J. Bunce, M.K. Dougherty, D.J. Southwood
  • Article Copyright Year:
  • 2019
  • Publication Volume:
  • 124
  • Publication Issue:
  • 7
  • Publication Date:
  • 07/01/2019
  • DOI:
  • https://doi.org/10.1029/2019JA026588

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