Radiophysics and Quantum Electronics

, Volume 42, Issue 7, pp 544–556 | Cite as

Influence of small-scale irregularities on the features of the overshoot effect in the temporal evolution of stimulated electromagnetic emission. Part I. Development stage

  • E. N. Sergeev
  • S. M. Grach
  • G. P. Komrakov
  • V. L. Frolov
  • P. Stubbe
  • B. Thidé
  • T. Leyser
  • T. Carozzi
Article

Abstract

We present the results of experimental studies of the evolution of stimulated electromagnetic emission of the ionosphere (SEE) under the F-layer modification by powerful HF radio waves in a broad range of the pump wave frequencies. We compare the parameters of the overshoot effect in SEE evolution to the observations of anomalous attenuation and field-aligned scattering of radio waves. We show the overshoot effect to result from the anomalous attenuation under scattering at artificial small-scale ionospheric irregularities. We found the characteristic time scales of the overshoot effect development to decrease and its value to increase as the pump wave frequency decreases from 6 to 4 MHz; this is attributed to the observed increase of the irregularities amplitude at scales\(l \bot \sim 3 - 10m\) m.

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Copyright information

© Kluwer Academic/Plenum Publishers 1999

Authors and Affiliations

  • E. N. Sergeev
    • 1
  • S. M. Grach
    • 1
  • G. P. Komrakov
    • 1
  • V. L. Frolov
    • 1
  • P. Stubbe
    • 2
  • B. Thidé
    • 3
  • T. Leyser
    • 3
  • T. Carozzi
    • 3
  1. 1.Radiophysical Research InstituteNizhny NovgorodRussia
  2. 2.Max-Planck Institut für AeronomieKatlenburg-LindauGermany
  3. 3.Institute of Space PhysicsUppsalaSweden

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