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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 27, issue 12
Ann. Geophys., 27, 4429–4433, 2009
https://doi.org/10.5194/angeo-27-4429-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 27, 4429–4433, 2009
https://doi.org/10.5194/angeo-27-4429-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

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. Verkhoglyadova1,2 and B. T. Tsurutani1 O. P. Verkhoglyadova and B. T. Tsurutani
  • 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
  • 2Center for Space Plasma and Aeronomic Research, University of Alabama in Huntsville, Huntsville, AL, USA

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.

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