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Observations of lion roars in the magnetosheath by the STAFF/DWP experiment on the Double Star TC-1 spacecraft
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SYSNO ASEP 0024196 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Observations of lion roars in the magnetosheath by the STAFF/DWP experiment on the Double Star TC-1 spacecraft Title Pozorování lvích řvů v magnetoobálce přístrojem STAFF-DWP na družici Double Star TC-1 Author(s) Yearby, K. H. (GB)
Alleyne, H. S. C. K. (GB)
Cornilleau-Wehrlin, N. (FR)
Santolík, Ondřej (UFA-U) RID, ORCID
Balikhin, M. A. (GB)
Walker, S. N. (GB)
Fazakerley, A. (GB)
Lahiff, A. (GB)Source Title Annales Geophysicae. - : Copernicus - ISSN 0992-7689
Roč. 23, - (2005), s. 2861-2866Number of pages 6 s. Language eng - English Country US - United States Keywords Magnetospheric physics (Magnetosheath) ; Space plasma physics (Waves and instabilities, Instruments and techniques) Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects 1P05ME811 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA202/03/0832 GA ČR - Czech Science Foundation (CSF) ME 650 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z30420517 - UFA-U, BC-A (2005-2011) Annotation Lion roars are intense, short duration packets of whistler mode waves, observed in the magnetosheath. They are typically seen coincident with the magnetic field minima of mirror mode waves. The orbit of the Double Star TC- 1 spacecraft (570 km by 78 970 km, inclination at 28.5 degrees) is ideal for observations of lion roars as the spacecraft is in the magnetosheath more than 50% of the time when the apogee is on the dayside. The STAFF/DWP experiment provides the spectral matrix of the three magnetic components at 27 frequencies in the range 10 Hz to 4 kHz, with one second time resolution, and also the waveform up to 180 Hz at a low duty cycle. The characteristics of lion roars observed are reported. The maximum lion roar intensities appear higher than reported by most previous studies. The electron temperature anisotropy is estimated from the lion roar frequency ratios, and is in reasonably good agreement with plasma measurements. This indicates the presence Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2006
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