Modeling the Nose Events Observed by Cluster on April 11, 2002 with UBK Method

Details Modeling the Nose Events Observed by Cluster on April 11, 2002 with UBK Method Modeling the Nose Events Observed by Cluster on April 11, 2002 with UBK Method

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm13b1806w&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM13B-1806

Physics

[2730] Magnetospheric Physics / Magnetosphere: Inner

Scientific paper

Nose Events, which names after the nose-like shape of structures in ion spectrograms observed by satellite in the inner magnetosphere, refers to the deep inward penetration of ions from magnetotail at discrete energy bands. Nose events have been studied extensively both with observations and simulations since first discovered in 1970s. In this study we use the UBK method to model the different L-Shell penetration characteristics for a multi-band nose event observed by Cluster/CODIF on April 11, 2002. It is found that for three H+ bands, the model predicted L-Shells are generally smaller than those observed by Cluster, from -1.8 RE for 6.5 keV band to -0.66 RE for 35.2 keV band. For the O+ band at 7.5 keV, the model predicted L-Shell is 0.3 RE larger than the observed L-Shell. Possible reasons are discussed for the discrepancies between the model and observation.

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