That's terrestrial FM band signals in the 100 MHz range. But any frequency can be FM modulated including ones with longer wavelengths. But FM is not generally natural. So what did they pick up? If it's cosmic whale flatus I shall be very disappointed.
That's terrestrial FM band signals in the 100 MHz range. But any frequency can be FM modulated including ones with longer wavelengths. But FM is not generally natural. So what did they pick up? If it's cosmic whale flatus I shall be very disappointed.