Dennis Hilberg, Jr. wrote: > I'll generate some plots and post links to them in a few days, after > enough data has been gathered. I probably should have done that from > the beginning.
I set up a machine (janus) specifically to monitor the offset of the machine running the wwvb receiver (apollo) as compared to my server running the GPS (saturn). Janus's only two synchronization sources are apollo and saturn, of which saturn is flagged as a truechimer to avoid janus jumping between the two sources, as happened in the beginning, which threw the measurements off. Janus polls saturn and apollo at minpoll 4 in order to follow them as closely as possible. Anyway, I've gathered plenty of data, and I can clearly see the stepping behavior I described before in the 24 hour pll offset plot. Interestingly though, viewing the seven day "offset as viewed from janus" plot shows a regular but much larger swing +-40 ms. Notice also the swings in the seven day frequency graph mimic the swing intervals on the "offset as viewed from janus" plot. Here are the plots: http://saturn.dennishilberg.com/ntpstats/rrdtool/apollo.php I really don't know what to make of the data, so any help would be appreciated. Thanks. -- Dennis Hilberg, Jr. \ timekeeper(at)dennishilberg(dot)com NTP Server Information: \ http://saturn.dennishilberg.com/ntp.php _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
