I have a GPS server with NTP output. I want to synchronize the clock on the UNIX server using the NTP output of the GPS.
After changing the UNIX server time manually, UNIX server takes a long time to synch with GPS time. for example if I change the UNIX server time to lag by 2 seconds, it takes approximately 20 minutes to synchronize with GPS time: similarly, if I change the UNIX server time to lag by 1 minutes; it is taking approximately 1 hour to synchronize with the GPS time.
My question, why does UNIX server takes such a long time to synch with GPS after changing the time maually?