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add img ionosphere propagation

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Thomas Bishop 2026-02-06 18:38:51 +00:00
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zk/Radio_wave_propagation.md
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@ -44,6 +44,8 @@ splitting off particles.
## Relation to radio
![](../img/ionosphere-scan-cropped.png)
The ionosphere is used to propagate HF-band frequencies. When the waves hit the
ionosphere, the charged particles interact with the wave and can bend it back
towards the Earth. This facilitates long-distance radio communication.