Anyone knows how to corelate various epoch time in dataflashlog ?

[SPP]

HI Guys,

The GPS data is easy it has the microseconds and the week and spot on.

The barometer and others is probably Linux/Unix epoch but I googled & googled, I can't find the conversion factor to match it to the GPS one.

I don't know if this link is valid for Solo. There is a possibility epoch used is Mavlink own, which is 1st Jan 2009 ?
MAVLINK Common Message set specifications
"Unix timestamp in microseconds or since system boot if smaller than MAVLink epoch (1.1.2009)"

MAVLINK Common Message set specifications
"Timestamp of the master clock in microseconds since UNIX epoch."

Anyone knows this thing ?

Thanks