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dc.contributor.authorAli, Ashar F.
Elkington, Scot R.
Tu, Weichao
Ozeke, Louis G.
Chan, Anthony A.
Friedel, Reiner H.W.
dc.date.accessioned 2015-05-15T17:06:33Z
dc.date.available 2015-05-15T17:06:33Z
dc.date.issued 2015
dc.identifier.citation Ali, Ashar F., Elkington, Scot R., Tu, Weichao, et al.. "Magnetic field power spectra and magnetic radial diffusion coefficients using CRRES magnetometer data." Journal of Geophysical Research: Space Physics, 120, no. 2 (2015) Wiley: 973-995. http://dx.doi.org/10.1002/2014JA020419.
dc.identifier.urihttps://hdl.handle.net/1911/80219
dc.description.abstract We used the fluxgate magnetometer data from Combined Release and Radiation Effects Satellite (CRRES) to estimate the power spectral density (PSD) of the compressional component of the geomagnetic field in the ∼1 mHz to ∼8 mHz range. We conclude that magnetic wave power is generally higher in the noon sector for quiet times with no significant difference between the dawn, dusk, and the midnight sectors. However, during high Kp activity, the noon sector is not necessarily dominant anymore. The magnetic PSDs have a very distinct dependence on Kp. In addition, the PSDs appear to have a weak dependence on McIlwain parameter L with power slightly increasing as L increases. The magnetic wave PSDs are used along with the Fei et al. (2006) formulation to compute DBLL[CRRES] as a function of L and Kp. The L dependence of DBLL[CRRES] is systematically studied and is shown to depend on Kp. More significantly, we conclude that DELL is the dominant term driving radial diffusion, typically exceeding DBLL by 1–2 orders of magnitude.
dc.language.iso eng
dc.publisher Wiley
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.title Magnetic field power spectra and magnetic radial diffusion coefficients using CRRES magnetometer data
dc.type Journal article
dc.contributor.funder National Aeronautics and Space Administration
dc.citation.journalTitle Journal of Geophysical Research: Space Physics
dc.subject.keywordradial diffusion
diffusion coefficients
CRRES
ULF waves
dc.citation.volumeNumber 120
dc.citation.issueNumber 2
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1002/2014JA020419
dc.identifier.grantID NNX09AI05G (National Aeronautics and Space Administration)
dc.identifier.grantID NNX13AO43H (National Aeronautics and Space Administration)
dc.type.publication publisher version
dc.citation.firstpage 973
dc.citation.lastpage 995


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