2024 May Frog like signal at 141p507

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2024 May Frog like signal at 141p507
Mode USB
Location Greece
Short Description

Unidentified signal that sounds like a frog in USB at 141.507 MHz.

Spotted at May 2024 in Greece.
I/Q Raw Recording Download file
Audio Sample

Unidentified signal that sounds like a frog in USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) at 141.507 MHzMegaHertz (MHz) 10^6 Hz.

Someone else half km away can hear it also.

The total bandwidth is not more than 12 kHzKiloHertz (kHz) 10^3 Hz and they seem to be mirrored from the center. Also the distance from the center is not the same and the frequency also varies. It transmits at irregular intervals and the strength varies (or distance).

I thing it is a long time there but i am sure the last 2 weeks i hear it daily any time (May 2024).

In a spectrum analyzer the sound seems to be a repeating pattern of very long tones followed by a combination of long and short wavy tones. Then after some seconds a new repeating pattern with different combination of short and long tones. Also at the beginning of each pattern the frequency climbs a little bit and then it plateaus.


More samples with trimmed out noise

Additional Images[edit]