Survey of ELF-VLF plasma waves in outer radiation belt observed by Cluster STAFF-SA experiment

D. Pokhotelov (1) , François Lefeuvre (2) , R.B. Horne (3) , Nicole Cornilleau-Wehrlin (4, 5)

1 Department of Electronics and Electrical Engineering [Bath]
2 LPCE - Laboratoire de physique et chimie de l'environnement
3 BAS - British Antarctic Survey
4 CETP - Centre d'étude des environnements terrestre et planétaires
5 USN - Unité Scientifique de la Station de Nançay

Various types of plasma waves have profound effects on acceleration and scattering of radiation belt particles. For the purposes of radiation belt modeling it is necessary to know statistical distributions of plasma wave parameters. This paper analyzes four years of plasma wave observations in the Earth's outer radiation belt obtained by the STAFF-SA experiment on board Cluster spacecraft. Statistical distributions of spectral density of different plasma waves observed in ELF-VLF range (chorus, plasmaspheric hiss, magnetosonic waves) are presented as a function of mag-netospheric coordinates and geomagnetic activity indices. Comparison with other spacecraft studies supports some earlier conclusions about the distribution of chorus and hiss waves and helps to remove the long-term controversy regarding the distribution of equatorial magnetosonic waves. This study represents a step towards the development of multi-spacecraft database of plasma wave activity in radiation belts.

Domaines: Planète et Univers [physics]

D. Pokhotelov, François Lefeuvre, R.B. Horne, Nicole Cornilleau-Wehrlin. Survey of ELF-VLF plasma waves in outer radiation belt observed by Cluster STAFF-SA experiment. Annales Geophysicae, 2008, 26 (11), pp.3269-3277. ⟨10.5194/angeo-26-3269-2008⟩. ⟨insu-02611958⟩