Hi Bob, On 13/03/2019 1:30 am, Bob kb8tq wrote:
Sorry if this is an ongoing / somewhat random dump of a bunch of things … I am not doing the same sort of thing you are doing. That makes a lot of this a bit less focused than maybe it could be.
Thanks for your suggestions - they have been most helpful. It was just when the discussion turned to Maser clocks and interferometry that I was concerned that the discussion had "dropped out of lock and drifting with many ppm" :-)
I simply want to know about the behaviour of the GPS 16 HVS under no-lock conditions. I need that information to optimise a fail-safe mechanism in my software. Basically, if there is a loss of lock I need to account for that. In my application, it doesn't matter if the GPS unit drops out of lock as I can re-schedule the timing event to a slightly later time when a valid fix is present. All that matters is that I have an accurate time-stamp. It doesn't matter if that time-stamp is re-scheduled for a minute or two later. However, if I know the drift of the 1 PPS output under invalid fix conditions I might not need to reschedule the timing event at all as long as the (tdrift/dt) * (how long the invalid fix has lasted) < 1 ms. The value of tdrift/dt is the key to implementing this.
Thanks for your suggestions. Cheers Steve HawkRAO _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
