Počet záznamů: 1
Identification of the source of quasiperiodic VLF emissions using ground-based and Van Allen Probes satellite observations
- 1.0446582 - ÚFA 2016 RIV US eng J - Článek v odborném periodiku
Titova, E. E. - Kozelov, B. V. - Demekhov, A. G. - Manninen, J. - Santolík, Ondřej - Kletzing, C. A. - Reeves, G.
Identification of the source of quasiperiodic VLF emissions using ground-based and Van Allen Probes satellite observations.
Geophysical Research Letters. Roč. 42, č. 15 (2015), s. 6137-6145. ISSN 0094-8276. E-ISSN 1944-8007
Grant CEP: GA ČR(CZ) GAP209/11/2280
Institucionální podpora: RVO:68378289
Klíčová slova: energetic electrons * quasiperiodic emissions * Van Allen Probes * VLF waves
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 4.212, rok: 2015
http://onlinelibrary.wiley.com/doi/10.1002/2015GL064911/full
We report on simultaneous spacecraft and ground-based observations of quasiperiodic VLF emissions and related energetic-electron dynamics. Quasiperiodic emissions in the frequency range 2-6kHz were observed during a substorm on 25 January 2013 by Van Allen Probe-A and a ground-based station in the Northern Finland. The spacecraft detected the VLF signals near the geomagnetic equator in the night sector at L=3.0-4.2 when it was inside the plasmasphere. During the satellite motion toward higher latitudes, the time interval between quasiperiodic elements decreased from 6min to 3min. We find one-to-one correspondence between the quasiperiodic elements detected by Van Allen Probe-A and on the ground, which indicates the temporal nature of the observed variation in the time interval between quasiperiodic elements. Multis{cyrillic}omponent measurements of the wave electric and magnetic fields by the Van Allen Probe-A show that the quasiperiodic emissions were almost circularly right-hand polarized whistler mode waves and had predominantly small (below 30°) wave vector angles with respect to the magnetic field.
Trvalý link: http://hdl.handle.net/11104/0248933
Počet záznamů: 1