PA6H/MT3339 GPS: how to know if time is GPS locked or from internal RTC?

At this moment I read:

RTC dtsat:3/0
GPS dtsat:3/0

Now I read:

3 dtsat:5/0
3 dtsat:5/0

Immediately after power off/power on I read:

RTC dtsat:2/0
GPS dtsat:2/0