38 lines
2.0 KiB
TeX
38 lines
2.0 KiB
TeX
% Author: Prof. Dr. Matthias Jung, DL9MJ
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% Year: 2024
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\begin{tikzpicture}
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% Earth:
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\draw[very thick] (0,0) arc (60:120:3);
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% Ionosphere
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\fill[DARCgray, name path=P1]
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(0,1.0) coordinate(start) arc (60:120:3) coordinate(c2)
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-- ++(0,+0.5)
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arc (120:60:3) coordinate(c6)
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-- (start);
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\path(0,1.00) coordinate(start) arc (60:105:3) coordinate(x1);
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\path(0,1.50) coordinate(start) arc (60:100:3) coordinate(x2);
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\path(0,1.75) coordinate(start) arc (60:95:3) coordinate(x3);
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\path(0,0) arc (60:110:3) coordinate(tx);
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\path(0,0) arc (60:70:3) coordinate(rx);
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\path(0,0) arc (60:90:3) coordinate(mid1);
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\path(mid1) ++(0,1.75) coordinate(mid2);
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\draw[DARCred, ultra thick, name path=P2] (tx) .. controls (mid2) and (mid2) .. (rx) node[pos=0.5, anchor=south]{Refraktion};
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\draw[DARCgreen, ultra thick, -Triangle] (tx) -- (x1) -- (x2) -- (x3);
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\path [name intersections={of=P1 and P2,by={CS1}}];
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\draw[dashed, name path=P5](CS1) -- ++(276:0.3) node[pos=1.0,anchor=north east]{\textcolor{DARCred}{$\varphi$}};
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\draw[dashed, name path=P7](tx) -- ++(20:0.5) node[pos=0.55, anchor=south]{\textcolor{DARCred}{$\alpha$}};
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\path[name path=P3](CS1) circle (0.25);
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\path[name path=P4](tx) -- (CS1);
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\path [name intersections={of=P3 and P4,by={CS2}}];
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\path [name intersections={of=P3 and P5,by={CS3}}];
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\draw[DARCred](CS2) to [bend right=30] (CS3);
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\path[name path=P6](tx) circle (0.225);
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\path [name intersections={of=P6 and P2,by={CS4}}];
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\path [name intersections={of=P6 and P7,by={CS5}}];
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\draw[DARCred](CS4) to [bend right=-30] (CS5);
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\path[name path=P8](tx) -- ++(110:1);
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\path [name intersections={of=P1 and P8,by={CS6}}];
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\draw[DARCblue, ultra thick, Triangle-Triangle](tx) ++(110:0.25) -- (CS6) node[anchor=south](){$f_\text{c}$};
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\draw(tx) node[antenna,scale=0.25,rotate=+20](ant1){};
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\draw(rx) node[antenna,scale=0.25,rotate=-20](ant2){};
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\end{tikzpicture} |