From 9533468f7d680c7e96415b75630a72428ac283e4 Mon Sep 17 00:00:00 2001
From: thomasabishop <thomasabishop@tuta.com>
Date: Fri, 6 Feb 2026 18:38:51 +0000
Subject: [PATCH] add img ionosphere propagation

---
 zk/Radio_wave_propagation.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/zk/Radio_wave_propagation.md b/zk/Radio_wave_propagation.md
index 932d296..aee0c44 100644
--- a/zk/Radio_wave_propagation.md
+++ b/zk/Radio_wave_propagation.md
@@ -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.