% Author: Prof. Dr. Matthias Jung, DL9MJ % Year: 2024 \begin{tikzpicture} % Earth: \draw[very thick] (0,0) arc (65:115:3); % 10km: \draw[dashed, gray] (0,0.5) node[anchor=west](){\qty{ 10}{\kilo\metre}} arc (65:115:3) coordinate(c1); \draw[dashed, gray] (0,1.0) node[anchor=west](){\qty{ 50}{\kilo\metre}} arc (65:115:3) coordinate(c2); \draw[dashed, gray] (0,1.1) node[anchor=west](){\qty{ 90}{\kilo\metre}} arc (65:115:3) coordinate(c3); \draw[dashed, gray] (0,1.2) node[anchor=west](){\qty{130}{\kilo\metre}} arc (65:115:3) coordinate(c4); \draw[dashed, gray] (0,1.3) node[anchor=west](){\qty{200}{\kilo\metre}} arc (65:115:3) coordinate(c5); \draw[dashed, gray] (0,1.5) node[anchor=west](){\qty{400}{\kilo\metre}} arc (65:115:3) coordinate(c6); \draw(c6) to [open, name={h4}] (c5); \draw(c5) to [open, name={h3}] (c4); \draw(c4) to [open, name={h2}] (c3); \draw(c3) to [open, name={h1}] (c2); \draw[gray](h1) node [anchor=east, text width=0.35cm](){D}; \draw[gray](h2) node [anchor=east, text width=0.35cm](){E}; \draw[gray](h3) node [anchor=east, text width=0.35cm](){$\text{F}_1$}; \draw[gray](h4) node [anchor=east, text width=0.35cm](){$\text{F}_2$}; % \path(0,0) arc (65:110:3) coordinate(tx); \path(0,0) arc (65:70:3) coordinate(rx); \path(0,0) arc (65:90:3) coordinate(mid1); \draw(tx) node[antenna,scale=0.25,rotate=+20](){}; \draw(rx) node[antenna,scale=0.25,rotate=-20](){}; \draw[DARCred, ultra thick, -Triangle] (tx) arc (110:97.5:3) node[pos=0.5, anchor=north, rotate=13](){Bodenwelle} coordinate(bw); \path(mid1) ++(0,1.75) coordinate(mid2); \draw(mid2) node[anchor=south](){Scheinbare Reflexion}; \draw[dashed] (tx) -- (mid2) -- (rx); \draw[DARCred, ultra thick] (tx) .. controls (mid2) and (mid2) .. (rx) node[pos=0.5, anchor=south]{\bfseries Refraktion}; \draw(mid1) node[anchor=south west](){Tote Zone}; \end{tikzpicture}