https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 On the coupling of fast and shear Alfvén wave modes by the ionospheric Hall conductance https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:20212 Wed 11 Apr 2018 16:40:32 AEST ]]> Propagation of ULF waves through the ionosphere: analytic solutions for oblique magnetic fields https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3308 Wed 11 Apr 2018 16:15:14 AEST ]]> High-latitude observations of impulse-driven ULF pulsations in the ionosphere and on the ground https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3282 Wed 11 Apr 2018 15:43:26 AEST ]]> On the spatial distribution of decameter-scale subauroral ionospheric irregularities observed by SuperDARN radars https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:20533 Wed 11 Apr 2018 15:07:31 AEST ]]> Statistical Birkeland current distributions from magnetic field observations by the Iridium constellation https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:4432 65 degrees during northward IMF; there is marked contrast between currents for northward and southward IMF but the evolution of the patterns is continuous with IMF rotation. The directions of flows inferred from the most poleward currents are more consistent with theoretical expectations of transport away from magnetopause reconnection than previous results. We attribute the differences to the restriction in this analysis to intervals having relatively stable distributions of current so that the data set corresponds more nearly to pure states of the system.]]> Wed 11 Apr 2018 15:05:45 AEST ]]> Monitoring cusp/cleft topology using Pc5 ULF waves https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:2808 Wed 11 Apr 2018 14:52:36 AEST ]]> Propagation of ULF waves through the ionosphere: inductive effect for oblique magnetic fields https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:2001 Wed 11 Apr 2018 14:39:39 AEST ]]> Spectral width of SuperDARN echoes: measurement, use and physical interpretation https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:1992 Wed 11 Apr 2018 14:29:33 AEST ]]> An empirical model of the quiet daily geomagnetic field variation https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:15977 Wed 11 Apr 2018 13:53:31 AEST ]]> A numerical model of the ionospheric signatures of time-varying magnetic reconnection: III. Quasi-instantaneous convection responses in the Cowley-Lockwood paradigm https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:1191 Wed 11 Apr 2018 13:31:39 AEST ]]> Seasonal and interplanetary magnetic field dependence of the field-aligned currents for both Northern and Southern Hemispheres https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:7916 0.]]> Wed 11 Apr 2018 13:26:57 AEST ]]> Comparison of large-scale Birkeland currents determined from Iridium and SuperDARN data https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3306 Wed 11 Apr 2018 13:13:10 AEST ]]> Pc3-4 ULF waves observed by the SuperDARN TIGER radar https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:418 Wed 11 Apr 2018 12:41:32 AEST ]]> Technique: large-scale ionospheric conductance estimated from combined satellite and ground-based electromagnetic data https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3499 Wed 11 Apr 2018 12:31:12 AEST ]]> Statistical analysis of the dependence of large-scale Birkeland currents on solar wind parameters https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:11505 y/Bz)) since this governs the spatial morphology of the currents. The Birkeland current densities were then corrected for variations in EUV-produced ionospheric conductance by normalizing the current densities to those occurring for 0° dipole tilt. To determine the dependence of the currents on other solar wind variables for a given IMF clock angle, the data were then sorted sequentially by the following parameters: the solar wind electric field in the plane normal to the Earth–Sun line, Eyz; the solar wind ram pressure; and the solar wind Alfvén Mach number. The solar wind electric field is the dominant factor determining the Birkeland current intensities. The currents shift toward noon and expand equatorward with increasing solar wind electric field. The total current increases by 0.8 MA per mV m⁻¹ increase in Eyz for southward IMF, while for northward IMF it is nearly independent of the electric field, increasing by only 0.1 MA per mV m⁻¹ increase in Eyz. The dependence on solar wind pressure is comparatively modest. After correcting for the solar dynamo dependencies in intensity and distribution, the total current intensity increases with solar wind dynamic pressure by 0.4 MA/nPa for southward IMF. Normalizing the Birkeland current densities to both the median solar wind electric field and dynamic pressure effects, we find no significant dependence of the Birkeland currents on solar wind Alfvén Mach number.]]> Wed 11 Apr 2018 11:29:24 AEST ]]> Refractive index effects on the scatter volume location and Doppler velocity estimates of ionospheric HF backscatter echoes https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:7905 Wed 11 Apr 2018 11:23:15 AEST ]]> Joint observations of a traveling ionospheric disturbance with the Paratunka OMTI camera and the Hokkaido HF radar https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:7906 Wed 11 Apr 2018 11:18:53 AEST ]]> Global observations of electromagnetic and particle energy flux for an event during northern winter with southward interplanetary magnetic field https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:4433 Wed 11 Apr 2018 10:29:48 AEST ]]> ULF wave effects on high frequency signal propagation through the ionosphere https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:7915 Wed 11 Apr 2018 10:00:58 AEST ]]> Dynamics of HF radar backscatter in the middle and high latitude ionospheres https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:31537 Wed 11 Apr 2018 09:41:14 AEST ]]> Observations and modelling of the wave mode evolution of an impulse-driven 3 mHz ULF wave https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:11152 Wed 11 Apr 2018 09:36:27 AEST ]]> A numerical model to investigate the polarisation azimuth of ULF waves through an ionosphere with oblique magnetic fields https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:1526 Wed 11 Apr 2018 09:34:00 AEST ]]> Real-time imaging of density ducts between the plasmasphere and ionosphere https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:28883 Wed 11 Apr 2018 09:26:13 AEST ]]> Doppler clutter in HF radar systems produced by ULF waves https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:14033 Wed 11 Apr 2018 09:25:20 AEST ]]> Deriving Global Convection Maps From SuperDARN Measurements https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:43159 Tue 13 Sep 2022 15:35:28 AEST ]]> An Extreme Auroral Electrojet Spike During 2023 April 24th Storm https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:55842 Sat 29 Jun 2024 16:04:18 AEST ]]> Estimation of global field aligned currents using the Iridium® System magnetometer data https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:1127 Sat 24 Mar 2018 08:32:03 AEDT ]]> Interstation Pc3 coherence at cusp latitudes https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:2807 Sat 24 Mar 2018 08:27:18 AEDT ]]> Plasma refilling rates for L = 2.3-3.8 flux tubes https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:10740 3.3. Plasmaspheric refilling progressed with a clear diurnal variation associated with linearly increasing plasma density in the daytime and decreasing plasma density at nighttime. The daytime increases in plasma mass density related to refilling rates ranging from ~250 to ~13 amu cm⁻³ h⁻¹ over L = 2.3–3.8. The resultant upward plasma flux at the 1000 km level was in the range 0.9–5.2 × 10⁸ amu cm⁻² s⁻¹. We also determined the daily averaged refilling rate to be ~420 amu cm⁻³ d⁻¹ at L = 2.9–3.1, including the nighttime downward flux. By comparison with Imager for Magnetopause-to-Aurora Global Exploration–EUV and VLF whistler data we were able to estimate the plasma composition and found the O⁺ proportion was of order 3%–7% at L = 2.3 and 6%–13% at L = 3.0.]]> Sat 24 Mar 2018 08:14:29 AEDT ]]> FDTD modeling of ULF waves in the magnetosphere and ionosphere https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:11564 Sat 24 Mar 2018 08:14:01 AEDT ]]> Results from a MHD model of ultra low frequency waves in the magnetosphere with realistic ionospheric conductances https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:5940 Sat 24 Mar 2018 07:48:25 AEDT ]]> Effect of ICME-Driven Storms on Field-Aligned and Ionospheric Currents From AMPERE and SuperMAG https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:53436 Mon 27 Nov 2023 11:48:05 AEDT ]]>