NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Pc 3 magnetic pulsations and precipitation of energetic electronsThe synchronous altitude satellite ATS 1 data and near-conjugate measurements of bremsstrahlung X-rays and ground magnetic variations were used to analyze an event of modulated auroral zone electron precipitation and magnetic pulsations in the Pc range. Transverse, azimuthal, nearly linearly polarized waves observed at ATS 1, ground magnetic pulsations at College, Alaska, and intervals of modulated electron precipitation centered on local magnetic moon, and noted in the X-ray data from Fort Yukon, Alaska, are discussed, noting that the origin of the Pc 3 waves is attributed to local field line resonances induced by Kelvin-Helmholtz instability at the magnetopause. The wave resonance model can explain observed differences in the pulsation activity at the ground, balloon, and satellite if account is taken of the spatial sensitivities of the techniques and the location of observing sites with respect to the probable location of resonant field lines. The data suggest that electron precipitation pulsations will correlate with Pc 3 magnetic pulsations when substorm injections coupled with azimuthal drift provide enhanced energetic particle fluxes with dayside resonance regions.
Document ID
19790064313
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Arthur, C. W.
(NASA Marshall Space Flight Center Space Sciences Laboratory, Huntsville, Ala., United States)
Bjordal, J.
(Bergen, Universitetet Bergen, Norway)
Rosenberg, T. J.
(Maryland, University College Park, Md., United States)
Date Acquired
August 9, 2013
Publication Date
August 1, 1979
Publication Information
Publication: Journal of Geophysical Research
Volume: 84
Subject Category
Geophysics
Accession Number
79A48326
Funding Number(s)
CONTRACT_GRANT: NSF GA-15807
CONTRACT_GRANT: NSG-673
CONTRACT_GRANT: NGR-05-007-004
CONTRACT_GRANT: NSF DPP-76-82041
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available