spatial and temporal variations of the high-altitude cusp precipitation

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ID: 225810
2004
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Abstract
Structured dispersion patterns of the ion precipitation in low- and mid-altitude cusp regions have been reported by many authors. These patterns are interpreted either as temporal features in terms of the pulsed reconnection model or as spatial changes caused by a combination of the particle velocity with the convection of magnetic field lines. It is generally expected that the spatial dispersion is predominantly observed in lower altitudes where the spacecraft crosses a wide range of geomagnetic coordinates in a short time, whereas the high-altitude spacecraft observes temporal changes because it stays nearly on the same field line for a long time.

We have analyzed one pass of the INTERBALL-1/MAGION-4 satellite pair through the high-altitude cusp and found that both temporal and spatial dispersion effects are important even in the magnetopause vicinity. The analysis of the present event shows a spatial nature of the observed dispersion in the LLBL and in the plasma mantle. We have identified two sources of a mantle precipitation operating simultaneously. Our investigations suggest that besides already reported latitudinal dispersion, the longitudinal dispersion can be observed during intervals of sufficiently high east-west interplanetary magnetic field component.

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nmeek2004annalesspatial Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Z. Němeček, J. Šimůnek, J. Šafránková, L. Přech
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Journal journal of food measurement and characterization
Year 2004
DOI
10.5194/angeo-22-2441-2004
URL
https://www.ann-geophys.net/22/2441/2004/angeo-22-2441-2004.pdf
Keywords
cosmic physics sciencephysicsgeophysics

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