Articles | Volume 27, issue 12
https://doi.org/10.5194/angeo-27-4429-2009
https://doi.org/10.5194/angeo-27-4429-2009
ANGEO Communicates
 | 
04 Dec 2009
ANGEO Communicates |  | 04 Dec 2009

Polarization properties of Gendrin mode waves observed in the Earth's magnetosphere: observations and theory

O. P. Verkhoglyadova and B. T. Tsurutani

Abstract. We show a case of an outer zone magnetospheric electromagnetic wave propagating at the Gendrin angle, within uncertainty of the measurements. The chorus event occurred in a "minimum B pocket". For the illustrated example, the measured angle of wave propagation relative to the ambient magnetic field θkB was 58°±4°. For this event the theoretical Gendrin angle was 62°. Cold plasma model is used to demonstrate that Gendrin mode waves are right-hand circularly polarized, in excellent agreement with the observations.