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Radio Science

Estimates of the scattering cross section of equatorial electrojet irregularities over the 3- to 7-MHz frequency band

Authors

  • Erhan Kudeki,

  • J. W. Wright


Abstract

Esq echo intensities recorded by a dynasonde system operated at Huancayo, Peru, are used to estimate the scattering cross section of equatorial electrojet plasma irregularities in the 3 to 7 MHz frequency band. The scattering radar cross section of vertically propagating ∼20-m scale electrojet irregularities is estimated as ∼3×10−7 m−1 over a period exhibiting ƒ0E values of 2.7 to 2.9 MHz. The cross-section variation with Bragg wavenumber k is found to be characterized with a power law index of approximately −3 over the HF band.

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