Spectral shapes of whistler–mode chorus emissions

0433454 - ÚFA 2015 GR A - Abstract
Macúšová, Eva - Santolík, Ondřej - Pickett, J. S. - Gurnett, D. A. - Cornilleau-Wehrlin, N.
Spectral shapes of whistler–mode chorus emissions.
Geospace revisited: a Cluster/MAARBLE/Van Allen Probes : Book of Abstracts. Athens: National Observatory Of Athens, 2014. s. 78-78.
[Geospace revisited: a Cluster/MAARBLE/Van Allen Probes. 15.09.2014-20.09.2014, Rhodes]
Institutional support: RVO:68378289
http://geospacerev.space.noa.gr/images/BookofAbstracts.pdf

The whistler-mode chorus waves usually consist of two frequency bands separated by a gap at one half of the electron cyclotron frequency. These two bands are composed of individual wave packets that exhibit different spectral shapes, as rising tones, falling tones, hooks, broadband lines, noisy patterns, shapeless hiss, and their different combinations. We have processed more than 11 years of high resolution measurements provided by the Wideband (WBD) instrument onboard four Cluster spacecraft in our study. We identify all time intervals containing chorus emissions with the discrete structure and divided them into groups of different spectral shapes. We then identify propagation and polarization properties for these groups of spectral shapes using the multicomponent measurements of the STAFF-SA instrument onboard four Cluster spacecraft. We also determine the distribution of individual groups of chorus spectral shapes in the Earth’s magnetosphere and the effect of the different geomagnetic conditions on their occurrence. This work receives EU support through the FP7-Space grant agreement no 284520 for the MAARBLE collaborative research project.
Permanent Link: http://hdl.handle.net/11104/0237694