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Simultaneous double star and cluster ftes observations on the dawnside flank of the magnetosphere
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2006 (English)In: Eur Space Agency Spec Publ ESA SP, 2006, no 598, 163-170 p.Conference paper (Refereed)
Abstract [en]

We present Cluster and Double Star-1 (TC-1) observations from a close magnetic conjunction on May 8, 2004. The five spacecraft were on the dawnside flank of the magnetosphere, with TC-1 located near the equatorial plane and Cluster at higher geographic latitudes in the southern hemisphere. TC-1, at its apogee, skimmed the magnetopause for almost 8 hours (between 08:00-16:00 UT). Flux Transfer Events (FTEs), moving southward/tailward from the reconnection site, were observed by TC-1 throughout almost all of the period. Cluster, travelling on a mainly dawn-dusk trajectory, crossed the magnetopause at around 10:30 UT in the same Magnetic Local Time (MLT) sector as TC-1 and remained close to the magnetopause boundary layer in the southern hemisphere. The four Cluster spacecraft observed FTEs for a period of 6.5 hours between 07:30 and 14:00 UT. From the properties of these FTEs, the reconnection site was located northward of both TC-1 and Cluster on the dawn flank of the magnetosphere. Reconnection occurred between draped magnetosheath and closed magnetospheric field lines. Despite variable interplanetary magnetic field (IMF) conditions and IMF-B z turnings, the IMF clock-angle remained greater than 70° and the location site appeared to remain relatively stable in position during the whole period. This result is in agreement with previous studies which reported that the dayside reconnection remained active for an IMF clock-angle greater than 70°. The simultaneous observation of FTEs at both Cluster and TC-1, separated by 2 hours in MLT, implies that the reconnection site on the magnetopause must have been extended over several hours in MLT. This event has been already presented in more details in [1].

Place, publisher, year, edition, pages
2006. no 598, 163-170 p.
, European Space Agency, (Special Publication) ESA SP, ISSN 0379-6566
Keyword [en]
Astrophysics, Boundary layers, Magnetic field effects, Magnetic fields, Space research, Spacecraft, Equatorial plane, Flux Transfer Events (FTE), Magnetic Local Time (MLT), Magnetopause, Magnetosphere
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:kth:diva-156368ScopusID: 2-s2.0-33646589966ISBN: 929092909XISBN: 9789290929093OAI: diva2:766438
5th Anniversary of Cluster in Space - Cluster and Double Star Symposium, 19-23 September 2005, Noordwijk, Netherlands

QC 20141127

Available from: 2014-11-27 Created: 2014-11-26 Last updated: 2014-11-27Bibliographically approved

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Lindqvist, Per-Arne
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Alfvén Laboratory Centre for Space and Fusion Plasma Physics
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