Search Publications
Repetitive X-line Hall current structures over the dawnside ionosphere induced by successive exo-magnetosphere pressure pulses
Sarafopoulos, D.
This work is a synthesis of observational and magnetosphere model produced results. In the first place, we observe geographic latitude-dependent delays in signature arrival times at dawnside ground magnetograms. We use the IMAGE chain ground station magnetograms associated with in-situ observations obtained from the Wind, ACE, IMP-8, LANL 97A and …
Solar wind velocity at solar maximum: A search for latitudinal effects
Bavassano, B.; Bruno, R.; D'Amicis, R.
Observations by Ulysses during its second out-of-ecliptic orbit have shown that near the solar activity maximum the solar wind appears as a highly variable flow at all heliolatitudes. In the present study Ulysses data from polar latitudes are compared to contemporary ACE data in the ecliptic plane to search for the presence of latitudinal effects …
Shell-like configuration in O+ ion velocity distribution at high altitudes in the dayside magnetosphere observed by Cluster/CIS
Lundin, R.; Nilsson, H.; Rème, H. +7 more
Available from http://www.copernicus.org/site/EGU/annales/22/7/2473.htm?FrameEngine=false;
First results obtained by the Cluster STAFF experiment
Maksimovic, M.; Chust, T.; de Conchy, Y. +20 more
The Spatio Temporal Analysis of Field Fluctuations (STAFF) experiment is one of the five experiments, which constitute the Cluster Wave Experiment Consortium (WEC). STAFF consists of a three-axis search coil magnetometer to measure magnetic fluctuations at frequencies up to 4 kHz, a waveform unit (up to either 10 Hz or 180 Hz) and a Spectrum Analy…
Source location of chorus emissions observed by Cluster
Maksimovic, M.; Parrot, M.; Cornilleau-Wehrlin, N. +2 more
One of the objectives of the Cluster mission is to study sources of various electromagnetic waves using the four satellites. This paper describes the methods we have applied to data recorded from the STAFF spectrum analyser. This instrument provides the cross spectral matrix of three magnetic and two electric field components. This spectral matrix…
Ulysses COSPIN observations of cosmic rays and solar energetic particles from the South Pole to the North Pole of the Sun during solar maximum
Balogh, A.; Kunow, H.; Posner, A. +10 more
In 2000-2001 Ulysses passed from the south to the north polar regions of the Sun in the inner heliosphere, providing a snapshot of the latitudinal structure of cosmic ray modulation and solar energetic particle populations during a period near solar maximum. Observations from the COSPIN suite of energetic charged particle telescopes show that lati…
Multi-scale magnetic field intermittence in the plasma sheet
Balogh, A.; Zhang, T. L.; Klecker, B. +9 more
This paper demonstrates that intermittent magnetic field fluctuations in the plasma sheet exhibit transitory, localized, and multi-scale features. We propose a multifractal-based algorithm, which quantifies intermittence on the basis of the statistical distribution of the strength of burstiness , estimated within a sliding window. Interesting mult…
On the existence of Alfvén waves in the terrestrial foreshock
Balogh, A.; Dandouras, I.; Eastwood, J. P. +2 more
The terrestrial foreshock is characterised by the existence of large amplitude ultra low frequency waves. The majority of such waves are observed to be left-handed in the spacecraft frame, but are in fact intrinsically right-handed and have been identified as fast-magnetosonic waves. More rarely observed are waves that are right-handed in the spac…
Evidence for impulsive solar wind plasma penetration through the dayside magnetopause
Lundin, R.; Sauvaud, J. -A.; Balogh, A. +15 more
This paper presents in situ observational evidence from the Cluster Ion Spectrometer (CIS) on Cluster of injected solar wind "plasma clouds" protruding into the day-side high-latitude magnetopause. The plasma clouds, presumably injected by a transient process through the day-side magnetopause, show characteristics implying a generation mechanism d…
Magnetospherically reflected chorus waves revealed by ray tracing with CLUSTER data
Maksimovic, M.; Santolík, O.; Parrot, M. +2 more
This paper is related to the propagation characteristics of a chorus emission recorded simultaneously by the 4 satellites of the CLUSTER mission on 29 October 2001 between 01:00 and 05:00 UT. During this day, the spacecraft (SC) 1, 2, and 4 are relatively close to each other but SC3 has been delayed by half an hour. We use the data recorded aboard…