J A Wild

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  • J A Wild, T K Yeoman, P Eglitis, H J Opgenoorth
  • 1999
High time resolution data from the CUT-LASS Finland radar during the interval 01:30±03:30 UT on 11 May, 1998, are employed to characterise the ionospheric electric ®eld due to a series of omega bands extending ~5° in latitude at a resolution of 45 km in the meridional direction and 50 km in the azimuthal direction. E-region observations from the STARE(More)
The properties of the Earth's coupled magnetosphere-ionosphere system are dominated by its interaction with the solar wind plasma, mediated by magnetic reconnection at the magnetopause interface. As a consequence, Earth's magnetospheric dynamics depend primarily on the concurrent orientation of the interplanetary magnetic field (IMF). In this paper we(More)
Cluster magnetic field data are studied during an outbound pass through the post-noon high-latitude magne-topause region on 14 February 2001. The onset of several minute perturbations in the magnetospheric field was observed in conjunction with a southward turn of the interplan-etary magnetic field observed upstream by the ACE spacecraft and lagged to the(More)
  • N C Maynard, D M Ober, W J Burke, J D Scudder, M Lester, M Dunlop +10 others
  • 2003
Magnetic merging on the dayside magnetopause often occurs at high latitudes. Polar measured fluxes of accelerated ions and wave Poynting vectors while skimming the subsolar magnetopause. The measurements indicate that their source was located to the north of the spacecraft, well removed from expected component merging sites. This represents the first use of(More)
[1] We present an interval of extremely long-lasting narrow-band Pc5 pulsations during the recovery phase of a large geomagnetic storm. These pulsations occurred continuously for many hours and were observed throughout the magnetosphere and in the dusk-sector ionosphere. The subject of this paper is the favorable radial alignment of the Cluster, Polar, and(More)
We present magnetic field and particle data recorded by the Cluster and Geotail satellites in the vicinity of the high-and low-latitude dayside magnetopause, respectively , on 17 February 2003. A favourable conjunction of these spacecraft culminated in the observation of a series of flux transfer events (FTEs), characterised by bipolar perturbations in the(More)
At 10:00 UT on 14 February 2001, the quartet of ESA Cluster spacecraft were approaching the Northern Hemisphere high-latitude magnetopause in the post-noon sector on an outbound trajectory. At this time, the interplan-etary magnetic field incident upon the dayside magnetopause was oriented southward and duskward (B Z negative, B Y positive), having turned(More)
We calculate the azimuthal magnetic fields expected to be present in Saturn's magnetosphere associated with two physical effects, and compare them with the fields observed during the flybys of the two Voyager spacecraft. The first effect is associated with the magnetosphere-ionosphere coupling currents which result from the sub-corotation of the(More)
  • M L Parkinson, M Pinnock, J A Wild, M Lester, T K Yeoman, S E Milan +4 others
  • 2005
Earthward injections of energetic ions and electrons mark the onset of magnetospheric substorms. In the inner magnetosphere (L∼4), the energetic ions drift westward and the electrons eastward, thereby enhancing the equatorial ring current. Wave-particle interactions can accelerate these particles to radiation belt energies. The ions are injected slightly(More)
  • A Marchaudon, J.-C Cerisier, J.-M Bosqued, M W Dunlop, J A Wild, P M E Décréau +3 others
  • 2003
Conjunctions in the cusp between the four Cluster spacecraft and SuperDARN ground-based radars offer unique opportunities to compare the signatures of transient plasma injections simultaneously in the high-altitude day-side magnetosphere and in the ionosphere. We report here on such observations on 17 March 2001, when the IMF initially northward and(More)