Monitoring the plasmapause using geomagnetic field line resonances
نویسندگان
چکیده
منابع مشابه
Monitoring the plasmapause using geomagnetic field line resonances
[1] This paper discusses the use of ground magnetometer data to derive plasma mass density profiles of the dayside plasmapause region with spatial and temporal resolution in the range 0.15–0.4 RE and 20–60 min. This is achieved using cross-phase techniques to identify field line resonance signatures that are not apparent in power spectra. Under quiet conditions, mass density profiles do not sho...
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[1] The structure of the density discontinuity across the plasmapause is often based on electron and H density profiles with the contribution of heavy ions (He, O etc) neglected. Electron and ion density measurements in this region may differ significantly due to the presence of heavy ions and it is important for the intercomparison of different datasets to understand these differences. Dynamic...
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An experimental study of the response to an impulsive driver in a low beta helium plasma is presented. Field line resonance ~FLR! spectra are recorded and compared to an ideal magnetohydrodynamic ~MHD! theory with finite ion cyclotron frequency corrections. The agreement between observed and predicted values is generally within the frequency resolution of the measurements except for the lowest ...
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The discussion in the preceding paper is restricted to the uncertainties in magnetic-field-line tracing in the magnetosphere resulting from published standard errors in the spherical harmonic coefficients that define the axisymmetric part of the internal geomagnetic field (i.e. gn dg 0 n). Numerical estimates of these uncertainties based on an analytic equation for axisymmetric field lines are ...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2004
ISSN: 0148-0227
DOI: 10.1029/2003ja010097