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- Title
Conjugate observations of quasiperiodic emissions by the Kannuslehto station and Van Allen Probes spacecraft.
- Authors
Bezdekova, Barbora; Nemec, Frantisek; Manninen, Jyrki; Hospodarsky, George B.; Santolik, Ondrej; Kurth, William S.; Hartley, David P.
- Abstract
Quasiperiodic emissions are electromagnetic waves observed in the inner magnetosphere inthe frequency range between about 0.5 and 4 kHz both by ground-based instruments andsatellites. They are characteristic by their almost periodic temporal modulation of the waveintensity with periods from tens of seconds to a few minutes. This study presents an analysis of 26 events observed simultaneously by the Kannuslehtostation in Finland (L ≈ 5.46) and Van Allen Probes spacecraft between 2013 and 2017. Thespatial extent of detected events was investigated demonstrating that they typically expandless than about 45 degrees in the azimuthal direction. Radial distances of the events aresystematically related to the plasmapause location with maximum event intensities by about2 RE lower than the plasmapause. This indicates a probable location of their sourceregion. Finally, event propagation parameters were analyzed as a function of relevantcontrolling factors, most importantly the distance from the plasmapause location.
- Subjects
FINLAND; ELECTROMAGNETIC waves; MAGNETOSPHERE; SPACE vehicles; ARTIFICIAL satellites
- Publication
Geophysical Research Abstracts, 2019, Vol 21, p1
- ISSN
1029-7006
- Publication type
Article