Hi Tom! Many thanks for your suggestion! I added MASK 30 to my ntp.oncore.0 file. By the way... mine is
MODE 1 LAT 40 55 13.1082 LONG -8 29 36.7247 HT 319.03 M TRAIM YES DELAY 25 NS CLEAR MASK 30 HARDPPS SHMEM /etc/oncore.0 Do you suggest any other change? I clipped it by mistake. My intention was to show both at the time that strange thing occurred. My clock stats file at that moment showed: 55904 33657.223 127.127.30.0 3532411256.999999443 2011 343 9 20 57 56 rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth -21 sat 38888888 55904 33658.223 127.127.30.0 3532411257.999998648 2011 343 9 20 58 57 rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth -32 sat 38888888 55904 33659.225 127.127.30.0 3532411258.999998420 2011 343 9 20 59 58 rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth -42 sat 38888888 55904 33660.223 127.127.30.0 3532411259.999997894 2011 343 9 21 0 59 rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth -52 sat 38888888 55904 33661.223 127.127.30.0 3532411261.000099284 2011 343 9 21 1 1 rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth 40 sat 38888888 55904 33662.223 127.127.30.0 3532411262.000200112 2011 343 9 21 2 2 rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth 29 sat 38888888 55904 33663.224 127.127.30.0 3532411263.000299488 2011 343 9 21 3 3 rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth 16 sat 38888888 55904 33664.224 127.127.30.0 3532411264.000399050 2011 343 9 21 4 4 rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth 2 sat 38888888 55904 33665.224 127.127.30.0 3532411265.000497312 2011 343 9 21 5 5 rstat 08 dop 0.0 nsat 9,8 traim 1,0,0 sigma 41 neg-sawtooth -10 sat 58888888 55904 33666.224 127.127.30.0 3532411266.000596142 2011 343 9 21 6 6 rstat 08 dop 0.0 nsat 9,8 traim 1,0,0 sigma 41 neg-sawtooth -23 sat 58888888 55904 33667.224 127.127.30.0 3532411267.000695546 2011 343 9 21 7 7 rstat 08 dop 0.0 nsat 9,8 traim 1,0,0 sigma 41 neg-sawtooth -37 sat 58888888 55904 33668.226 127.127.30.0 3532411268.000794635 2011 343 9 21 8 8 rstat 08 dop 0.0 nsat 9,8 traim 1,0,0 sigma 41 neg-sawtooth -49 sat 58888888 55904 33669.224 127.127.30.0 3532411269.000891144 2011 343 9 21 9 9 rstat 08 dop 0.0 nsat 9,8 traim 1,0,0 sigma 41 neg-sawtooth 43 sat 55888888 55904 33670.224 127.127.30.0 3532411270.000989030 2011 343 9 21 10 10 rstat 08 dop 0.0 nsat 9,8 traim 1,0,0 sigma 41 neg-sawtooth 32 sat 55888888 55904 33671.224 127.127.30.0 3532411271.001085565 2011 343 9 21 11 11 rstat 08 dop 0.0 nsat 9,8 traim 1,0,0 sigma 41 neg-sawtooth 21 sat 55888888 55904 33672.224 127.127.30.0 3532411272.001181597 2011 343 9 21 12 12 rstat 08 dop 0.0 nsat 9,8 traim 1,0,0 sigma 41 neg-sawtooth 10 sat 58888888 55904 33673.226 127.127.30.0 3532411273.001277993 2011 343 9 21 13 13 rstat 08 dop 0.0 nsat 9,8 traim 1,0,0 sigma 41 neg-sawtooth -1 sat 58888888 55904 33674.224 127.127.30.0 3532411274.001372357 2011 343 9 21 14 14 rstat 08 dop 0.0 nsat 9,8 traim 1,0,0 sigma 41 neg-sawtooth -14 sat 58888888 55904 33675.225 127.127.30.0 3532411275.001469208 2011 343 9 21 15 15 rstat 08 dop 0.0 nsat 9,8 traim 1,0,0 sigma 41 neg-sawtooth -27 sat 58888885 55904 33676.225 127.127.30.0 3532411276.001563913 2011 343 9 21 16 16 rstat 08 dop 0.0 nsat 9,8 traim 1,0,0 sigma 41 neg-sawtooth -40 sat 58888885 55904 33677.225 127.127.30.0 3532411277.001658965 2011 343 9 21 17 17 rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth 51 sat 08888885 55904 33678.227 127.127.30.0 3532411278.001752142 2011 343 9 21 18 18 rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth 38 sat 08888885 55904 33679.225 127.127.30.0 3532411279.001845688 2011 343 9 21 19 19 rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth 26 sat 08888885 By the way: can you explain the traim, sigma and neg-sawtooth values please? Cheers, Miguel On 9 December 2011 14:39, Thomas Laus <[email protected]> wrote: > On 2011-12-09, Miguel Gon?alves <[email protected]> wrote: > > Hi! > > > > This morning my FreeBSD 7.4 Oncore UT+ NTP server exhibited a strange > > behaviour... Note the huge jump in offset from 854 ns to 596 us and then > > the highest offset at 159 ms. > > > > loop stats file: > > > > 55904 33635.224 0.000001230 -1.282 0.000000888 0.001755 4 > > 55904 33651.224 0.000000854 -1.282 0.000000807 0.001642 4 > > 55904 33667.224 -0.000596143 98.718 0.000167778 35.355334 4 > > 55904 33683.227 -0.002127304 98.718 0.000187390 33.071886 4 > > 55904 33699.227 -0.003561445 98.718 0.000176065 30.935917 4 > > 55904 33715.228 -0.004910077 98.718 0.000165214 28.937901 4 > > 55904 33731.231 -0.006175330 98.718 0.000155121 27.068927 4 > > 55904 33747.230 -0.007362986 98.718 0.000145378 25.320663 4 > > 55904 33763.231 -0.008479146 98.718 0.000136915 23.685311 4 > > 55904 33779.232 -0.009525378 98.718 0.000128152 22.155580 4 > > 55904 33795.233 -0.010508291 98.718 0.000120356 20.724648 4 > > 55904 33811.233 -0.011431854 98.718 0.000113179 19.386133 4 > > 55904 33827.236 -0.012298303 98.718 0.000106061 18.134067 4 > > 55904 33843.235 -0.013111000 98.718 0.000099472 16.962866 4 > > 55904 33859.235 -0.013875647 98.718 0.000093789 15.867308 4 > > 55904 33875.246 -0.014592572 98.718 0.000087576 14.842508 4 > > 55904 33891.236 -0.015265789 98.718 0.000082514 13.883895 4 > > 55904 33907.237 -0.015897754 98.718 0.000077516 12.987194 4 > > 55904 33923.237 -0.015990842 -1.281 0.000113346 37.383905 4 > > 55904 33939.235 -0.015012221 -1.281 0.000119575 34.969441 4 > > > > clock stats file: > > > > 55904 33650.223 127.127.30.0 3532411249.999999141 2011 343 9 20 50 49 > > rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth -34 sat > > 38888888 > > 55904 33651.223 127.127.30.0 3532411250.999999704 2011 343 9 20 51 50 > > rstat 08 dop 0.0 nsat 9,7 traim 1,0,0 sigma 41 neg-sawtooth -49 sat > > 38888888 > > > > The machine is running 4.2.6p4. What might have caused this? This machine > > does nothing else providing NTP to the network. > > > The most likely cause for the offset change that you observed was > related to the satellite position relationship taking a bad track. > This is minimized by setting a higher mask angle in your Oncore > configuration and not use satellites below 10 degrees above the > horizon. If you have trees or other obstuctions in the area, use an > even higher angle. GPS satellites have their maximum accuracy when > their path to you is 'high in the sky' and without obstructions. > > It is unfortunate that you chopped off the portion of your clockstats > file that coincided with 'something interesting' being recorded in > your loopstats file. This occurred at 55904 33667.224 in the log. > > Tom > -- > Public Keys: > PGP KeyID = 0x5F22FDC1 > GnuPG KeyID = 0x620836CF > > _______________________________________________ > questions mailing list > [email protected] > http://lists.ntp.org/listinfo/questions > _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
