u/Otherwise-Big-5541

Equipment (listed in order of connection):

• 137 MHz V-dipole
• 137 MHz SAW filter before the LNA
• External LNA with bias tee
• 5-meter 5D-FB coaxial cable
• RTL-SDR Blog V4
• 2-meter USB extension cable
• Laptop

I have never seen or heard a signal like this before. Normally, METEOR transmits a relatively uniform signal that sounds like noise, but here there is an obvious tonal modulation. I can't figure out what it is or how to decode it. SatDump doesn't give me anything useful, and I'm not sure which mode I should select.