GEOPHYSICAL RESEARCH LETTERS, VOL. 25, NO. 23, DECEMBER 1, 1998

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Observation of Isolated Structures of the Low Latitude Boundary Layer with the Interball Tail Probe

O. L. Vaisberg1, V. N. Smirnov1, L. A. Avanov1, J. H. Waite, Jr.2, J. L. Burch2, C. T. Russell3, A. A. Skalsky1, and D. L. Dempsey2

1Space Research Institute, Moscow, Russia.
2Southwest Research Institute, San Antonio, Texas, USA.
3Institute of Geophysics and Planetary Physics, UCLA, Los Angeles, California, USA.

Received July 31, 1998, revised September 22, 1998, accepted October 16, 1998

Abstract:

We analyze the structure of magnetospheric transients observed at the dusk-side low-latitude magnetopause with the Interball Tail Probe. Ion and magnetic field measurements are used to investigate one particular transient in more detail. This transient has distinct non-symmetric structure with the plasma characteristics and the flow properties of the leading part of the transient being quite different from those in the trailing part of the transient. The region separating these two parts corresponds to the change of the sign in the Bn component. These observations support an earlier conclusion that some plasma irregularities within the Low Latitude Boundary Layer (LLBL), formed as a result of sporadic reconnection, disconnect from the magnetopause, propagate and dissipate in the magnetosphere, and form what we call Disconnected Magnetosheath Transfer Events (DMTEs).





GRL Space Physics and Aeronomy / Editor - R. M. Winglee /
winglee@geophys.washington.edu