Cluster and RBSP observations of propagation directions of whistler-mode chorus

0427204 - ÚFA 2015 US eng A - Abstract
Santolík, Ondřej - Macúšová, Eva - Kolmašová, Ivana - Kurth, W. S. - Hospodarsky, G. B. - Kletzing, C. - Cornilleau-Wehrlin, N. - Pickett, J. S. - Gurnett, D. A. - Wygant, J. R. - Bonnell, J. W.
Cluster and RBSP observations of propagation directions of whistler-mode chorus.
AGU Fall Meeting 2012. San Francisco: AGU, 2012.
[AGU Fall Meeting /45./. 03.12.2012-07.12.2012, San Francisco]
Institutional support: RVO:68378289
Keywords : electromagnetic emissions * whistler-mode chorus * plasma waves and instabilities
Subject RIV: DG - Athmosphere Sciences, Meteorology
http://abstractsearch.agu.org/meetings/2012/FM/sections/SM/sessions/SM24A/abstracts/SM24A-02.html

Electromagnetic emissions of whistler-mode chorus have been identified as a source of energy for the relativistic electrons in the outer Van Allen radiation belt. Being generated by anisotropic electron populations in the source region around the equatorial minimum of the geomagnetic field, chorus is believed to transfer energy between different parts of the electron phase space distribution. It has been shown that chorus, on average, carries enough power to account for the observed changes in the radiation belt fluxes at time scales on the order of one day. However, propagation directions of these emissions control their ability to efficiently interact with electrons. We investigate 10 years of measurements of the Cluster mission in order to determine the probability density functions of propagation directions of chorus as a function of geomagnetic latitude, magnetic local time, L* parameter, and frequency. These results give context to new measurements of whistler-mode chorus by the Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) Waves instrument onboard the Radiation Belt Storm Probes (RBSP) spacecraft.
Permanent Link: http://hdl.handle.net/11104/0232812