[Please check out this] audio sample of a signal I heard today (July 20, 2021) around 07h17 UTC on (at least) 4 different frequencies, simultaneously:
– 16166 kHz
– 16716 kHz
– 16747 kHz
– 16839 kHz
Always the same. Five beeps repeating in intervals of 30 seconds.
Another mystery to be solved by your readers.
Thank you for sharing this, Carlos. Hopefully, a reader can comment and ID these beeps for us!