Hi,

I am using gr-air-modes for decoding the air plane signal with USRP. I've
successfully used the "modes_rx" and "modes_gui" for decoding the mode-S
packets.

However, it seems that the modes_rx or modes_gui can't provide the
timestamp of the mode-S packets being decoded. Is there any option that I
can set to timestamp the mode-S packet? The reason I want this timestamp
function is that I want to know the decoded packet data correspond to which
part of the raw data (complex baseband data samples).

Thank you for any help you can provide in this situation.

I found that there's a file called "air_modes_preamble.cc" seems to provide
the timestamp function. Does anyone know how to use this file separately?

Best regards,
Cheng Chi
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