Simultaneous observations of field-aligned currents and particle fluxes in the post-midnight sector

Details Simultaneous observations of field-aligned currents and particle fluxes in the post-midnight sector Simultaneous observations of field-aligned currents and particle fluxes in the post-midnight sector

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976georl...3..395k&link_type=abstract

Geophysical Research Letters, vol. 3, July 1976, p. 395-398.

Physics

4

Electron Precipitation, Field Aligned Currents, Lines Of Force, Magnetic Signatures, Magnetospheric Instability, Particle Motion, Satellite Observation, Current Density, Ion Motion, Isis-B, Magnetometers, Time Response

Scientific paper

The paper presents several examples of simultaneous measurements of electrons and positive ions (5 eV to 15 eV) and of magnetic field perturbations due to field-aligned currents made on the polar-orbiting ISIS-2 satellite at 1400 km altitude in the early morning local time (MLT) sector. There is a good general correspondence between changes in the gradient of the E-W component of the magnetic field along the spacecraft orbit and changes in the character of the low-energy electron fluxes. The equatorward region of outward current flow in this post-midnight sector is spatially coincident with the isotropic precipitation associated with the low-altitude plasma sheet. In cases examined, electron current density always exceeds positive ion current density by a factor of 10 and usually by a factor of over 100.

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