Skynet 5B - 257.900 MHz: unknown data mode (mystery solved)

click the pic for higher resolution

That's what SpectraVue showed me this morning at 0836z. I have been listening on 257.900 MHz (Skynet 5B satellite) in USB, using a remote receiver of the network.

Anyone got a clue about the mode in question?

UPDATE: You sometimes have to step back to see the whole picture:

picture courtesy of

As you can see, the transponders bandwidth is 35 kHz while I was looking at a portion of some 6 kHz before, only. Thank you, Paul!

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