Physics – Plasma Physics
Scientific paper
Nov 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3361l&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 22, p. 3361-3364
Physics
Plasma Physics
20
Ionosphere: Auroral Ionosphere, Ionosphere: Particle Precipitation, Ionosphere: Instruments And Techniques, Space Plasma Physics: Charged Particle Motion And Acceleration
Scientific paper
We report here three-point measurements of bursty, velocity-dispersed, field-aligned electron precipitation at the poleward edge of a northward-moving, post-breakup, nightside auroral arc. The three-point measurement allows detection of the proper motion of the inverted-V arc, which is shown to be 550 m/sec northward. The velocity dispersion patterns are fitted to find the source altitude of the precipitation bursts as a function of distance from the poleward edge of the arc. These source points are interpreted to trace out the low-altitude boundary of the inverted-V potential drop, which is seen to rise both in time, and in the northward direction. The precipitation bursts under the inverted-V are seen to have an arc-aligned velocity which varies with time, and which is consistent with the measured
Ivchenko Nickolay
Lynch Kristina Anne
Marklund Göran
Pietrowski David
Primdahl Fritz
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