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Monitoring of the Electron-Acceleration Region with Auroral Kilometric Radiation

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Abstract

A method is proposed for the study of the height–time characteristics of physical processes in the region of auroral electron acceleration. Auroral kilometer radiation, which is generated at the local electron gyrofrequency, can be used to obtain the height distribution of the properties of a radiation source in the auroral region, and long-term satellite measurements of the auroral kilometric radiation allows the evolution of these features to be tracked over time. This approach to the analysis of auroral kilometric radiation makes it possible to obtain data remotely on variations in the features of its source concurrently along the magnetic field line of the acceleration region. This approach has been used here to analyze the auroral kilometric radiation recorded on the INTERBALL-2 satellite within the POLRAD experiment. The analysis has revealed a regular change in the wavelet spectra of fluctuations in the auroral kilometric radiation along the magnetic field line. In the given frequency range with an almost constant radiation intensity, the fluctuation spectrum follows a power law at high altitudes and becomes uniform over all characteristic times at low altitudes. This spectral transformation indicates that the processes in the source of auroral kilometric radiation are nonlinear.

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ACKNOWLEDGMENTS

The authors are grateful to the reviewers, whose comments stimulated significant improvement of the manuscript.

Funding

This study was supported by the Russian Foundation for Basic Research, project no. 18-29-21037.

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Authors and Affiliations

  1. Space Research Institute, Russian Academy of Sciences, 117997, Moscow, Russia

    D. V. Chugunin, A. A. Chernyshov, I. L. Moiseenko & M. M. Mogilevsky

  2. Institute of Applied Physics, Russian Academy of Sciences, 603155, Nizhny Novgorod, Russia

    M. E. Viktorov

Authors
  1. D. V. Chugunin
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  2. A. A. Chernyshov
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  3. I. L. Moiseenko
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  4. M. E. Viktorov
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  5. M. M. Mogilevsky
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Correspondence to D. V. Chugunin.

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Translated by V. Arutyunyan

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Chugunin, D.V., Chernyshov, A.A., Moiseenko, I.L. et al. Monitoring of the Electron-Acceleration Region with Auroral Kilometric Radiation. Geomagn. Aeron. 60, 538–546 (2020). https://doi.org/10.1134/S0016793220040039

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