Results 51 to 60 of about 2,155,828 (298)

Spatial and temporal characteristics of poloidal waves in the terrestrial plasmasphere: a CLUSTER case study [PDF]

Annales Geophysicae, 2007
Oscillating magnetic field lines are frequently observed by spacecraft in the terrestrial and other planetary magnetospheres. The CLUSTER mission is a very suitable tool to further study these Alfvén waves as the four CLUSTER spacecraft provide for an
S. Schäfer, K. H. Glassmeier, P. T. I. Eriksson, V. Pierrard, K. H. Fornaçon, L. G. Blomberg   +5 more
doaj   +1 more source

Accuracy of multi-point boundary crossing time analysis [PDF]

Annales Geophysicae, 2011
Recent multi-spacecraft studies of solar wind discontinuity crossings using the timing (boundary plane triangulation) method gave boundary parameter estimates that are significantly different from those of the well-established single-spacecraft ...
J. Vogt, S. Haaland, S. Haaland, G. Paschmann   +3 more
doaj   +1 more source

Cluster magnetotail observations of a tailward-travelling plasmoid at substorm expansion phase onset and field aligned currents in the plasma sheet boundary layer [PDF]

Annales Geophysicae, 2005
We present data from both ground- and space-based instruments for a substorm event which occurred on 5 October 2002, with an expansion phase onset time of 02:50 UT determined from the ground magnetometer data.
N. C. Draper, M. Lester, S. W. H. Cowley, J. A. Wild, S. E. Milan, G. Provan, A. Grocott, A. N. Fazakerley, A. Lahiff, J. A. Davies, J.-M. Bosqued, J. P. Dewhurst, R. Nakamura, C. J. Owen, J. Waterman, M. G. Henderson, H. J. Singer, E. Donovan   +17 more
doaj   +1 more source

Conjugate observations of quasi‐periodic emissions by Cluster and DEMETER spacecraft [PDF]

Journal of Geophysical Research: Space Physics, 2013
AbstractQuasi‐periodic (QP) emissions are electromagnetic emissions at frequencies of about 0.5–4 kHz that are characterized by a periodic time modulation of the wave intensity. Typical periods of this modulation are on the order of minutes. We present a case study of a large‐scale long‐lasting QP event observed simultaneously on board the DEMETER ...
Michel Parrot, M. Hayosh, Jolene S. Pickett, N. Cornilleau-Wehrlin, František Němec, Ondrej Santolik, Ondrej Santolik   +6 more
openaire   +6 more sources

Magnetopause current as seen by Cluster [PDF]

Annales Geophysicae, 2005
The four-spacecraft, magnetic field measurements on Cluster can be combined to produce an accurate determination of the electric current in the magnetopause boundary during stable magnetopause crossings.
M. W. Dunlop, M. W. Dunlop, A. Balogh
doaj   +1 more source

Remote sensing of a NTC radio source from a Cluster tilted spacecraft pair [PDF]

Annales Geophysicae, 2013
Abstract. The Cluster mission operated a "tilt campaign" during the month of May 2008. Two of the four identical Cluster spacecraft were placed at a close distance (~50 km) from each other and the spin axis of one of the spacecraft pair was tilted by an angle of ~46°.
P. M. E. Décréau, S. Kougblénou, G. Lointier, J. L. Rauch, J. G. Trotignon, X. Vallières, P. Canu, S. Grimald, F. El‐Lemdani Mazouz, F. Darrouzet   +9 more
openalex   +11 more sources

Near-simultaneous magnetotail flux rope observations with Cluster and Double Star [PDF]

Annales Geophysicae, 2007
We present observations of three magnetic flux ropes in the tail of the Earth's magnetosphere on 7 August 2004 by the Cluster and Double Star TC-1 spacecraft.
A. P. Walsh, A. N. Fazakerley, R. J. Wilson, R. J. Wilson, I. V. Alexeev, P. D. Henderson, C. J. Owen, E. Lucek, C. Carr, I. Dandouras   +9 more
doaj   +1 more source

Cluster electron observations of the separatrix layer during traveling compression regions [PDF]

, 2005
[ 1] We present Cluster 4-point observations of electrons during traveling compression regions ( TCRs) on 19 September 2001. The electron and \B\ signatures vary with distance from the plasma sheet, confirming that transient plasma sheet bulges propagate
Balogh, A, Dunlop, MW, Fazakerley, AN, Owen, CJ, Slavin, JA   +4 more
core   +1 more source

Methods of Orbit Clustering of Serviced Spacecraft

System technologies, 2019
When planning orbital service operations, it is important to rationally divide a set of orbits serviced by a spacecraft into subsets (clusters) of orbits. This article proposes a technique for clustering the orbits of serviced spacecraft in the event of their servicing by a reusable service spacecraft with an electric rocket low thrust engine.
Anatolii Petrovych Alpatov, Yurii Mykhailovych Holdshtein   +1 more
openaire   +2 more sources

Four-spacecraft determination of magnetopause orientation, motion and thickness: comparison with results from single-spacecraft methods [PDF]

Annales Geophysicae, 2004
In this paper, we use Cluster data from one magnetopause event on 5 July 2001 to compare predictions from various methods for determination of the velocity, orientation, and thickness of the magnetopause current layer. We employ established as well as
S. E. Haaland, S. E. Haaland, B. U. Ö. Sonnerup, M. W. Dunlop, A. Balogh, E. Georgescu, H. Hasegawa, B. Klecker, G. Paschmann, G. Paschmann, P. Puhl-Quinn, H. Rème, H. Vaith, A. Vaivads   +13 more
doaj   +1 more source