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\begin{document}

\title{Estimation of the mode conversion effect on the determination of
southern boundary for the \$\textbackslash{}sim\$ 100 MeV electron
precipitations}



\author[1]{George Fedorovich Remenets}%
\author[2]{Aleksandr M. Astafiev}%
\affil[1]{Saint Petersburg State University}%
\affil[2]{Saint Petersburg State University, Russian Federation}%


\vspace{-1em}



  
  \date{May 21, 2024}


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\begin{abstract}
The parameters of sporadic \$D\_s\$ layer of electric conductivity
caused by ultraenergetic relativistic electron (URE) precipitations are
determined due to indirect electromagnetic method. Previously we
determined the southern boundaries of these precipitations in the frames
of the following supposition: the effect of a normal wave reflection and
its conversion into other normal waves on the boundary between disturbed
and undisturbed parts of a radio path might have been ignored. Now we
show by accurate simulation that it was true for strong and moderate
disturbances. For the powerful URE disturbances the effect is
significant. In order to obtain this result we had to change a
traditional problem statement about a normal wave conversion in the
terrestrial waveguide and to solve numerically this new problem with a
\$\{\}\^{}\{\textbackslash{}prime
\textbackslash{}prime\}\$volume\$\{\}\^{}\{\textbackslash{}prime
\textbackslash{}prime\}\$ inhomogeneity.%
\end{abstract}%



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