blinry ☎️254620: Receive amateur packet radio
In the 2-meter amateur band, there are certain frequencies for the "Automatic Packet Reporting System". It's a bit like IP – packets have a "from" and a "to". They can also broadcast their position, or weather data.
Some stations seem to announce themselves as repeaters, which probably help forward the packets to increase the range.
And two people seem to be on a "fieldday", and broadcast their location. :D
SDRangel can create a map automatically:
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