Access of Solar Electrons to the Polar Cap and Comparison with GEO Observations

Details Access of Solar Electrons to the Polar Cap and Comparison with GEO Observations Access of Solar Electrons to the Polar Cap and Comparison with GEO Observations

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm11a1700m&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM11A-1700

Astronomy and Astrophysics

Astrophysics

[2716] Magnetospheric Physics / Energetic Particles: Precipitating, [2776] Magnetospheric Physics / Polar Cap Phenomena, [7514] Solar Physics, Astrophysics, And Astronomy / Energetic Particles, [7984] Space Weather / Space Radiation Environment

Scientific paper

Observations of high energy electrons, useful as predictors of solar energetic particle (SEP) proton flux, are easily detectable both outside and inside the magnetosphere (excluding the radiation belts). However, statistical studies of are beginning to reveal that electron precursors are not visible at all L-shells, even when the observation occurs well inside the polar cap, which questions the accessibility of the magnetosphere even when the field lines are considered to be “open” to solar wind flow. Although possible explanations for the lack of observations at all L-shells are that the particle instruments aboard some of the satellites used in this study are not sensitive enough to measure the low fluxes of a subset of these electron precursors, a mapping analysis of electron flux from the SAMPEX and HEO satellite observations in the polar cap to GEO orbit will help determine if previous studies of electron precursors in the literature are valid throughout the magnetosphere at all L. It will also help us determine if the SAMPEX, GOES, and HEO data can be used to specify SEP electron and proton and rise times predictions throughout the magnetosphere at all L.

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