Multi-satellite Investigations of the Cusps Under Various Pitch Angle Sorting Algorithms

Details Multi-satellite Investigations of the Cusps Under Various Pitch Angle Sorting Algorithms Multi-satellite Investigations of the Cusps Under Various Pitch Angle Sorting Algorithms

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsm31b..03k&link_type=abstract

American Geophysical Union, Spring Meeting 2009, abstract #SM31B-03

Physics

2706 Cusp, 2728 Magnetosheath, 2740 Magnetospheric Configuration And Dynamics, 2794 Instruments And Techniques

Scientific paper

The magnetospheric cusps are important conduits between the magnetosheath and ionospheric plasma populations, however, their dynamic nature and large spatial size make them difficult regions of study. Previous work by Keith and Stubbs [Adv. Space Res., Vol. 41, No. 10, 2008] to identify conjunctions in the cusps between the Cluster and DMSP satellite missions have resulted in the two data sets currently under investigation. The limited field of view of the SSJ/4 instruments on the DMSP spacecraft (F-6 through F-15) means that the low-altitude data is always of downgoing (precipitating) particles. In contrast, the 3D nature of the particle data sets of Cluster, together with their much higher altitude, require accurate pitch angle sorting of the particle spectra as an important aspect of the data analysis. Multiple pitch angle sorting algorithms, both those including bulk velocity and those ignoring it, will be subjected to similar analysis, noting the qualitative and quantitative differences and the effects it may have on the conclusions that may be reached. This should help determine the sensitivity of these data to the sophistication of the sorting method used and the robustness of the analysis when being compared to low-altitude data.

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