Physics
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.7609s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A5, p. 7609-7620.
Physics
90
Algorithms, Boundary Value Problems, Geomagnetic Tail, Magnetic Field Configurations, Current Sheets, Goes 2, Noaa Satellites, Particle Motion
Scientific paper
The equatorial boundary of the isotropic precipitation of energetic protons measured by the low-altitude NOAA spacecraft is studied. The observed isotropic boundary (IB) invariant altitude and its variations with MLT at nightside agree fairly well within the values predicted by the T89 magnetospheric model, but there are considerable deviations at the dayside. The IB latitudes on the nightside are strongly controlled by the tail equatorial magnetic field. The preferred magnetic field components predicted by the IB algorithm method display a high correlation with the corresponding field components measured by GOES 2. These results strongly support the view that particle scattering in the equatorial current sheet is, at least on the nightside, the dominant mechanism producing the isotropic precipitation of energetic protons.
Malkov Maksim
Mursula Kalevi
Sergeev Aleksandre V.
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