If you have a Stratus 1S or 2S receiver, if you upgrade your firmware to version 1.1, then you will be able to view the start time resolution at a seconds level.
If you have a Stratus 2, you will need to update your firmware to version 2.1 for this enhancement.
You can update your firmware using the Stratus Updater app found here:
You can also update your firmware within ForeFlight by following the instructions in this article:
How do I update the firmware on my Stratus receiver?