[ntp:questions] Odd offset for PPS DCD w/ Garmin GPS 18x LVC
lellis
larry.ellis at gmail.com
Tue Mar 22 15:30:56 UTC 2011
On Win XP, I am seeing an odd positive offset of about 128ms on the
Atom driver, relative to other sources:
remote refid st t when poll reach delay
offset jitter
==============================================================================
*GPS_NMEA(1) .GPS. 0 l 6 16 377 0.000
0.373 0.919
xPPS(1) .PPS. 0 l 5 16 377 0.000
125.447 0.830
-clock.team-cymr 172.16.65.22 2 u 39 64 77 12.989
-41.044 44.960
+ntp.okstate.edu .USNO. 1 u 42 64 77 28.906
-18.762 25.784
+navobs1.wustl.e .GPS. 1 u 38 64 77 19.133
1.819 19.599
Normally, I just use NMEA with fudge, but that was also showing the
odd offset so I removed fudge and added the Atom driver to help debug
this.
(Normally the status shows oPPS(1) but xPPS(1) is seen above for the
obvious reason.
ntpd is Dave Hart release 4.2.7p138; I have a serialpps-ppsapi-
provider.dll dated 6/6/2009.
Any ideas or recommendations.
More information about the questions
mailing list