How can I tell if timestamp is coming from gps ?

[pat]

Hello,

In the vpl launch file, we activated the gps time like that:
<arg name="gps_time" default="true" />
is there anything else than this that we need to do ?

Because the time stamp for the lidar is 17min off.

If there's an issue of communication between the lidar and the gps, will the driver fallback on ros time for time stamping ?

[Mahmoudadham4040]

please, is it solved?