Search Publications
Off-limb EUV observations of the solar corona and transients with the CORONAS-F/SPIRIT telescope-coronagraph
Slemzin, V.; Kuzin, S.; Zhitnik, I. +4 more
The SPIRIT telescope aboard the CORONAS-F satellite (in orbit from 26 July 2001 to 5 December 2005), observed the off-limb solar corona in the 175 Å (Fe IX, X and XI lines) and 304 Å (He II and Si XI lines) bands. In the coronagraphic mode the mirror was tilted to image the corona at the distance of 1.1...5 Rsun from the solar center, t…
The wave surveyor technique for fast plasma wave detection in multi-spacecraft data
Narita, Y.; Constantinescu, O. D.; Vogt, J.
Multi-satellite missions like Cluster allow to study the full spatio-temporal variability of plasma processes in near-Earth space, and both the frequency and the wave vector dependence of dispersion relations can be reconstructed. Existing wave analysis methods include high-resolution beamformers like the wave telescope or k-filtering technique, a…
Transients in oxygen outflow above the polar cap as observed by the Cluster spacecraft
Lundin, R.; Yamauchi, M.; Sauvaud, J. -A. +11 more
Oxygen ion outflow associated with the cusp and cleft give rise to persistent oxygen ion beams which can be observed over the polar cap. For high altitude spacecraft such as Cluster these beams are often observed for several hours on each occasion. This allows for a study of typical temporal structures on the time scale of minutes. We have used 3 …
Influence of non-stationary electromagnetic field conditions on ion pick-up at Titan: 3-D multispecies hybrid simulations
Glassmeier, K. -H.; Motschmann, U.; Simon, S.
Titan's interaction with the corotating Saturnian magnetospheric plasma is studied in terms of a three-dimensional electromagnetic hybrid model. This approach treats the electrons as a massless, charge-neutralizing fluid, whereas the ions are represented by macroparticles. The model considers two magnetospheric and three ionospheric ion species. I…
Evidence for particle acceleration in the magnetospheric cusp
Chen, J.
New evidence reveals that the charged particles can be energized locally in the magnetospheric cusp. The power spectral density of the cusp magnetic fluctuations shows increases by up to four orders of magnitude in comparison to an adjacent region. Large fluctuations of the cusp electric fields have been observed with an amplitude of up to 350 mV/…
Derivation of inner magnetospheric electric field (UNH-IMEF) model using Cluster data set
Khotyaintsev, Y.; Torbert, R. B.; Matsui, H. +3 more
We derive an inner magnetospheric electric field (UNH-IMEF) model at L=2 10 using primarily Cluster electric field data for more than 5 years between February 2001 and October 2006. This electric field data set is divided into several ranges of the interplanetary electric field (IEF) values measured by ACE. As ring current simulations which requir…
EISCAT and Cluster observations in the vicinity of the dynamical polar cap boundary
Dandouras, I.; Amm, O.; Fazakerley, A. +5 more
The dynamics of the polar cap boundary and auroral oval in the nightside ionosphere are studied during late expansion and recovery of a substorm from the region between Tromsø (66.6° cgmLat) and Longyearbyen (75.2° cgmLat) on 27 February 2004 by using the coordinated EISCAT incoherent scatter radar, MIRACLE magnetometer and Cluster satellite measu…
Are there current-sheet-like structures in the Earth's magnetotail as in the solar wind - results and implications from high time resolution magnetic field measurements by Cluster
Li, G.; Lee, E.; Parks, G.
Recent studies of solar wind MHD turbulence show that current-sheet-like structures are common in the solar wind and they are a significant source of solar wind MHD turbulence intermittency. While numerical simulations have suggested that such structures can arise from non-linear interactions of MHD turbulence, a recent study by Borovsky (2006), u…
Energetic particle measurements from the Ulysses/COSPIN/LET instrument obtained during the August/September 2005 events
Forsyth, R. J.; Marsden, R. G.; Tranquille, C. +3 more
We report recent observations of energetic particles at energies 1-40 MeV/n made by the COSPIN/LET instrument onboard the Ulysses spacecraft during the period of intense solar activity in August/September 2005 during the declining phase of solar cycle 23. Ulysses, having started its climb to high southern latitudes for the third time, was located …
Analysis of plasma waves observed in the inner Saturn magnetosphere
Gurnett, D. A.; Coates, A. J.; Hospodarsky, G. B. +3 more
Plasma waves observed in the Saturn magnetosphere provide an indication of the plasma population present in the rotationally dominated inner magnetosphere. Electrostatic cyclotron emissions often with harmonics and whistler mode emission are a common feature of Saturn's inner magnetosphere. The electron observations for a region near 5 RS