Where is the timestamp located in Arducopter dataflash log file?

[rafiqrana]

For flight analysis purposes, I have recorded and downloaded the Arducopter flight DataFlash log file (filename.bin) using Mission Planner. Later I converted the “filename.bin” file into “filename.mat” file using the Mission Planner built-in “Dataflash logs” tool. The datetime timestamp is visible on the Mission Planner log browser; however, I only see timestamp (TimeUS : Time since system startup) in “filename.mat” file, but I was wondering where is the Unix time or epoch data is located.

To convert “filename.bin” to “filename.mat” I followed:

To explore the real dateTime data I followed:

No unix time/epoch/real datetime in “.mat” file as follows:

[Mustafa_Gokce]

I don’t think it exists, I looked in the logs but none of the logs have some field like it.
May be due to the decrease in the size of logs.
But I think you can calculate it with GPS log.
Those logs include GMS and GWk.
So from there, you can calculate exactly what the TimeUS corresponds to in UNIX time.
I might be wrong about the existence of it but you can calculate like above

Correct GPS Time Stamp

GMS and GWK would be the best way to get the current gps time yes. the tick with that though is there is latency vs the measurement data. so correlating that data could be interesting.