I'm noticing that the UTC time generated from the GPS is usually in increments of 10ms, but there are a very large number of times where it jumps forwards or backwards 10-250ms. Over the course of about 1.5 hours I can see a consistent drift from the internal clock compared to the UTC clock.
Log file zipped
https://drive.google.com/file/d/0BxajkT ... sp=sharing
xlsx file of just internal clock, UTC, and difference calculations with graph
https://drive.google.com/file/d/0BxajkT ... sp=sharing