Physics
Scientific paper
Feb 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3403101s&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 3, CiteID L03101
Physics
16
Magnetospheric Physics: Substorms, Magnetospheric Physics: Energetic Particles: Precipitating, Magnetospheric Physics: Magnetospheric Configuration And Dynamics
Scientific paper
Using data from an array of ground-based single beam riometers and the CRRES Medium Energy B (MEB) particle detector we examine the signature of dispersionless electron injections. We find that it is possible to distinguish a dispersionless electron injection by it's integrated (>30 keV) flux signature at in situ satellites with a simple rise time criteria. If the total electron flux >30 keV exhibits a dramatic rise within 3 minutes then the signature is guaranteed to correspond to a dispersionless injection. Since the Kennel-Petschek limit for strong pitch angle scattering is almost certainly met during substorm injections and riometers respond to the >30 keV energy range, this translates to an equivalent criteria for riometer absorption. We present results obtained using our selection criteria for the ground-based identification of dispersionless electron injections including MLT dependence and initial spatial extent of the electron injection region.
Donovan Eric
Friedel Reiner
Korth Alex
Spanswick Emma
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