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References

Burton et al., 1975
Burton, R. K., R. L. McPherron, and C. T. Russell, An empirical relationship between interplanetary conditions and Dst, 80, 4204, 1975.

Iijima and Potemra, 1976
Iijima, T., and T. A. Potemra, The amplitude distribution of field-aligned currents at northern high latitudes observed by Triad, 81, 2165, 1976.

Le et al., 1998
Le, G. C. T. Russell, and J. G. Luhmann, POLAR magnetic observations of the low altitude, high latitude magnetosphere during the January 1997 magnetic cloud event, 25, 2541, 1998.

Lepping et al., 1995
Lepping, R. P., et al., The Wind magnetic field investigation, Space Sci. Rev., 71, 207, 1995.

Ogilvie et al., 1995
Ogilvie, K. W., et al., SWE, A comprehensive plasma instrument for the Wind spacecraft, Space Sci. Rev., 71, 55, 1995.

Russell et al., 1995
Russell, C. T., R. C. Snare, J. D. Means, D. Pierce, D. Dearborn, M. Larson, G. Barr, and G. Le, The GGS/Polar magnetic fields investigation, Space Sci. Rev., 71, 563, 1995.

Russell et al., 1997
Russell, C. T., X.-W. Zhou, G. Le, P. H. Reiff, J. G. Luhmann, C. A. Cattell and H. Kawano Field aligned currents in the high latitude, high altitude magnetosphere: POLAR initial results, Geophys. Res. Lett., 24, 1455, 1997.

Tsyganenko, 1996
Tsyganenko, N. A., Effects of the solar wind conditions on the global magnetospheric configuration as deduced from data-based field models, in Proceedings of the ICS-3 Conference on Substorms, ESA SP-389, pp. 181-185, ESA Paris, 1996.

Zhou et al., 1997
Zhou, X.-W., C. T. Russell, G. Le, and N. Tsyganenko, Comparison of observed and model magnetic fields at high altitudes above the polar cap: POLAR initial results, Geophys. Res. Lett., 24, 1451, 1997.

Zhou et al., 1999
Zhou, X.-W., C. T. Russell, and G. Le, Local time and IMF By dependence of field-aligned currents at high-altitudes, J. Geophys. Res., in press, 1999.


 
Figure 1: The Wind IMF and solar wind data as well as Dst index for May 10-15, 1999.


 
Figure 2: Polar orbit in GSM coordinates on May 11. The Polar orbit on May 14 is essentially the same as that on May 11. The magnetopause position is that expected for May 14 with nominal solar wind dynamic pressure of 2 nPa and northward IMF. The irregularly shaped trace is the Polar orbit scaled by the sixth root of the solar wind dynamic pressure on May 11.


 
Figure 3: Residual of the magnetic field by subtracting the IGRF model field from the Polar MFE data.


 
Figure 4: Residuals of the magnetic field by subtracting the T96 model that uses WIND solar wind and IMF conditions and a ring current of Dst=-10 nT as inputs.


 
Figure 5: The FAC magnetic field perturbation in east-west component as a function of magnetic latitudes of Polar ionospheric footprints in the southern hemisphere at altitudes of ~ 5000 km near Polar perigees. The thick traces are for May 11 and thin traces for May 14.


next up previous
Next: About this document ... Up: The magnetosphere on May Previous: Summary
Guan Le
12/23/1999