Hello.

It's my first time asking questions.

I am solving different time synchronisation of PC.

Checked that NTP synchronizes to less than 1 millisecond using ntpq. I would like to ask for help on how to verify this without using ntpq, ntdate etc.

I used 'ssh' to see the approximate difference in time between computers on the screen. I'd like to know a slightly more accurate time error for everything I have to consider, such as the Netwick Transmission Delay.

I use several nvidia xavier in uuntu 18.04 and 'ROS melodic'

Thank everyone.