The digital 406 MHz signals received by the satellites mentioned in TFA are unencrypted and can be receive by ground-based receivers as well. There are commerc

The digital 406 MHz signals received by the satellites mentioned in TFA are unencrypted and can be receive by ground-based receivers as well. There are commercial receivers/decoders[1] but you can also do it fairly easily with an appropriate antenna and SDR[2]. [1] https://wst.ca/beacon_monitor.html https://wst.ca/beacon_monitor.html [2] https://www.bytebang.at/Blog/ELT+Testing+with+rtl-sdr https://www.bytebang.at/Blog/ELT+Testing+with+rtl-sdr