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Kinematics and Physics of Celestial Bodies

, Volume 29, Issue 3, pp 107–119 | Cite as

Specific features of VLF wave propagation in the earth’s inner magnetosphere

  • D. I. MendzhulEmail author
  • O. V. Agapitov
  • O. K. Cheremnykh
Solar Physics
  • 39 Downloads

Abstract

The ray trajectories of waves in the very low frequency (VLF) range in the case of nonducted propagation in the earth’s inner magnetosphere are studied as functions of location of their source region, frequency, and initial angle between the vector of wave normal and intensity vector of external magnetic field. Simulation is performed on the basis of geometric ray tracing approach in multicomponent plasma. The parameters of the magnetospheric medium were calculated using a diffusion model of the concentration distribution of plasma components and the International Geomagnetic Reference Field (IGRF) model. It is shown that the magnetospheric wave reflection can occur if the lower hybrid resonance frequency is greater than its own wave frequency (ω LHF > ω), i.e., at the latitudes λ ≈ 50°. The simulation results confirm that the quasi-longitudinal approximation cannot be used to describe the magnetospheric whistler propagation. We present simulations of propagation of chorus-type wave magnetospheric emissions that were performed using realistic wave distributions over initial parameters. In particular, we present distributions of chorus waves over directions of wave vector as functions of geomagnetic latitude; these distributions are required to study the particle scattering and acceleration processes in the radiation belts. Our results well agree with CLUSTER satellite measurements.

Keywords

Celestial Body Radiation Belt Geomagnetic Latitude Whistler Wave International Geomagnetic Reference Field 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Allerton Press, Inc. 2013

Authors and Affiliations

  • D. I. Mendzhul
    • 1
    Email author
  • O. V. Agapitov
    • 2
    • 3
    • 4
  • O. K. Cheremnykh
    • 1
  1. 1.Space Research InstituteNational Academy of Sciences of Ukraine and National Space Agency of UkraineKyivUkraine
  2. 2.Taras Shevchenko National University of KyivKyivUkraine
  3. 3.Le StudiumInstitute for Advanced StudiesOrleansFrance
  4. 4.LPC2E/CNRS - University of OrleansOrleansFrance

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