George R. Kasica <geor...@netwrx1.com> writes: >>>Since you have a GPS receiver, three internet servers should be >>>sufficient as backup and a sanity check for the GPS. >>See below, now set up as recommended with three us.pool.ntp.org >>servers but as you say it will take some time to be useful, but I >>don't seem to be getting the NEMA data as of 1415Z 28-dec-2008. >> >># ntpq -p >> remote refid st t when poll reach delay offset >>jitter >>============================================================================== >> GPS_NMEA(0) .GPS. 0 l 273 16 0 0.000 -664.93 >>0.002 >>xSHM(0) .PPS. 0 l 7 16 227 0.000 -634.51 >>349.893 >> eagle-local 192.168.1.7 4 u 11 64 37 0.120 -11.083 >>0.523 >> apollo-local 192.168.1.7 3 u 18 64 37 0.224 6.685 >>0.765 >>x64.247.17.251 129.6.15.28 2 u 12 64 37 34.158 -18.850 >>6.764 >>+ip-72-167-54-20 204.123.2.72 2 u 13 64 37 82.722 1.031 >>1.821 >>*caspak.cerias.p .GPS. 1 u 10 64 37 22.867 7.745 >>10.934 >>
>OK here is about 21 hours later 11Z 29 Dec-2008: ># ntpq -p > remote refid st t when poll reach delay offset >jitter >============================================================================== >xGPS_NMEA(0) .GPS. 0 l 2 16 375 0.000 -722.08 >9.115 >xSHM(0) .PPS. 0 l 6 16 377 0.000 -722.20 >7.892 > eagle-local 192.168.1.7 4 u 390 1024 377 0.181 -5.629 >4.389 > apollo-local 192.168.1.7 4 u 410 1024 377 0.311 -2.394 >0.299 >*got.my.mojo.net 192.5.41.41 2 u 966 1024 377 30.157 -5.166 >0.361 >+kiri.nonexiste. 64.202.112.75 2 u 644 1024 377 9.423 -5.517 >203.143 >+host2.kingrst.c 99.150.184.201 2 u 944 1024 377 16.221 -11.608 >16.695 >still seing both of the local GPS/PPS entries as false tickers but I >also see the offsets are huge compared to other clocks...where do I go >from here to correct this?? OK, it is really really suspicious that both nmea and shm are equal amounts off. That should not be. It is as if your shm is actually reporting the nmea time rathr than the pps time. What are you running to deliver the shm signals to the system? >ntp.conf is below: ># LinuxPPS: GPS >server 127.127.20.0 minpoll 4 >fudge 127.127.20.0 flag3 1 flag2 0 > ># SHM: PPS filtered mean >server 127.127.28.0 minpoll 4 >fudge 127.127.28.0 refid PPS flag3 1 > >server eagle.netwrx1.com iburst >server apollo.netwrx1.com iburst >server 0.us.pool.ntp.org iburst >server 1.us.pool.ntp.org iburst >server 2.us.pool.ntp.org iburst _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
