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30: Assess the propagation of radio waves using beacons

The International Beacon Project runs a network of 18 stations, which take turns transmitting their callsigns at certain frequencies.

Using this system, you can quickly get a sense of how well radio waves are currently propagating to your location. Clever!

I picked up the beacon from southern Finland! You can see its callsign scrolling away in the video. It's followed by four dashes send with decreasing power. I only heard the first one…