Search Publications
Cavities of weak magnetic field strength in the wake of FTEs: Results from global magnetospheric MHD simulations
Toth, G.; Hesse, M.; Wang, Y. +4 more
We use the global magnetohydrodynamic (MHD) code BATS-R-US to model multipoint observations of Flux Transfer Event (FTE) signatures. Simulations with high spatial and temporal resolution predict that cavities of weak magnetic field strength protruding into the magnetosphere trail FTEs. These predictions are consistent with recently reported multi-…
“Hook” structure in MARSIS ionogram and its interpretation
Wang, X. -D.; Zou, H.; Wang, J. -S. +1 more
MARSIS/MEX is a low frequency radar used to sound the ionosphere of Mars. In general the echo trace associated with reflections in nadir indicates an ionosphere with a main maximum electron density at typically about 130 km altitude, and a monotonously decreasing density with increasing altitude. Another maximum is sometimes detected at higher alt…
Modeling the response of the induced magnetosphere of Venus to changing IMF direction using MESSENGER and Venus Express observations
Boardsen, Scott A.; Gloeckler, George; Ho, George C. +14 more
The second MESSENGER flyby of Venus on 5 June 2007 provided a new opportunity to study the response of the induced magnetosphere of the planet to changes in the direction of the interplanetary magnetic field (IMF). At the time of the MESSENGER flyby, the European Space Agency's Venus Express spacecraft was located outside the magnetosphere and pro…
Solar wind periodicity in energetic electrons at Saturn
Krupp, N.; Krimigis, S. M.; Mitchell, D. G. +2 more
Fluxes of energetic electrons (110-365 keV) have been subjected to a long-term Lomb periodogram analysis from the middle of 2004 to the middle of 2009. Fluxes within 20 RS and outside the magnetopause were excluded, so only fluxes within the magnetosphere were included in the analysis. The periodicity “box” was expanded from 5 hours to …
Magnetopause reconnection impact parameters from multiple spacecraft magnetic field measurements
Wendel, Deirdre E.; Reiff, Patricia H.
We present a novel technique that exploits multiple spacecraft data to determine the impact parameters of the most general form of magnetic reconnection at the magnetopause. The method consists of a superposed epoch of multiple spacecraft magnetometer measurements that yields the instantaneous magnetic spatial gradients near a magnetopause reconne…
Reconnection Hall current system observed in the magnetotail and in the ionosphere
Snekvik, K.; Østgaard, N.; Amm, O. +1 more
On 07 Sep 2001 around 21:40 UT, Cluster was located 19 R E downtail, and observed earthward fast flows and strong perturbations in the dawn-dusk component of the magnetic field (B Y ). The perturbations corresponded to a sheet of tailward field aligned current close to the neutral sheet and another sheet of earthward field…
Tsallis distribution of the interplanetary magnetic field at 0.72 AU: Venus Express observation
Zhang, T. L.; Wang, C.; Li, X. Y.
Previous work shows that Probability Distribution Functions (PDFs) of the interplanetary magnetic field strength differences can be described by a single function - Tsallis distribution at Earth and beyond. Launch of Venus Express enables us to extend the application of Tsallis distribution to the inner heliosphere at 0.72 AU. This paper analyzes …