Observations of lion roars in the magnetosheath by the STAFF/DWP experiment on the Double Star TC-1 spacecraft

0024196 - ÚFA 2006 RIV US eng J - Článek v odborném periodiku
Yearby, K. H. - Alleyne, H. S. C. K. - Cornilleau-Wehrlin, N. - Santolík, Ondřej - Balikhin, M. A. - Walker, S. N. - Fazakerley, A. - Lahiff, A.
Observations of lion roars in the magnetosheath by the STAFF/DWP experiment on the Double Star TC-1 spacecraft.
[Pozorování lvích řvů v magnetoobálce přístrojem STAFF-DWP na družici Double Star TC-1.]
Annales Geophysicae. Roč. 23, - (2005), s. 2861-2866. ISSN 0992-7689. E-ISSN 1432-0576
Grant CEP: GA MŠMT 1P05ME811; GA ČR GA202/03/0832; GA MŠMT ME 650
Grant ostatní: ESA PECS(XE) 98025
Výzkumný záměr: CEZ:AV0Z30420517
Klíčová slova: Magnetospheric physics (Magnetosheath) * Space plasma physics (Waves and instabilities, Instruments and techniques)
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 1.450, rok: 2005

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

Práce popisuje pozorování lvích řvů v magnetoobálce přístrojem STAFF-DWP na družici Double Star TC-1.
Trvalý link: http://hdl.handle.net/11104/0114778