Identification of Dispersionless Injection with Incoherent Scatter Radar

Details Identification of Dispersionless Injection with Incoherent Scatter Radar Identification of Dispersionless Injection with Incoherent Scatter Radar

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm33a2136g&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM33A-2136

Physics

[2455] Ionosphere / Particle Precipitation, [2716] Magnetospheric Physics / Energetic Particles: Precipitating, [2730] Magnetospheric Physics / Magnetosphere: Inner

Scientific paper

Dispersionless electron Injections (herein "DIs") are associated with the substorm expansion phase and are defined as an increase in high energy (10-100+ keV) electron fluxes observed simultaneously across multiple energy channels. DIs have an associated ionospheric signature that has been observed with Relative Ionospheric Opacity Meters (riometers) which measure cosmic radio noise absorption caused by the precipitation of electrons with energies in excess of ~25 keV [Spanswick, et al., JGR, 2007]. The ionospheric signature associated with DIs should also be identifiable in Incoherent Scatter Radar (ISR) data with the added benefit of possibly being able to extract significantly better information regarding the energy evolution of the DI. There is also the possibility to monitor the injection front as it moves through the field of view of the ISR, something that is not possible with wide beam riometer data. We present the results of a preliminary comparison of DI signatures from in-situ (near-equatorial) observations and magnetically conjugate ISR data.

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