Flying a return leg from Goodwood to Rochester on Saturday and almost immediately after takeoff SD seemed to lose its GPS lock and the plane/map stopped moving. All was ok for the 60 minute first leg.

I checked the device and it had a GPS lock in Google Maps, and I verified there was a clear line of sight to the GPS sensor. Stopped and restarted SD, but got the "awaiting GPS message". After about 15 minutes it caught up, then almost immediately lost it again.

I appreciate this doesn't give much to go on, but if there's any other info that would help troubleshooting please let me know.

Dave