Thread: NTP using IRIG-B

i have brandywine gps-8 receiver outputting irig-b data on serial cable. attempting bring data ubuntu 10.04 can have server share time rest of network.

problem is, cannot find information on @ all. have clue how complete task?

have tried gpsd, see connected when gpsctl @ 9600 baud not see data behind it. know receiver connected can see 6 satellites , have tried 2 different serial cables.


thanks,

there patch submitted in 2007 unit work. try 4800 baud:

https://support.ntp.org/bugs/show_bug.cgi?id=838

https://lists.ntp.isc.org/pipermail/...ay/002956.html

setting accurate gps time? if so, it's simpler use ntp 2nd order corrections, using driftfile--you'll network + or - 1 millisecond of selected time source servers.

here's /etc/ntp.conf:


tgalati4@tubuntu2:/etc$ cat ntp.conf
# updated 20 oct 08 add new servers
logfile /home/tgalati4/ntp_stuff/ntp_trace.log
driftfile /var/lib/ntp/ntp.drift
# next 4 lines adds statistics /var/log/ntpstats--hopefully
statistics loopstats peerstats # clockstats
statsdir /var/log/ntpstats/
filegen peerstats file peers type day link enable
filegen loopstats file loops type day link enable
# filegen clockstats file clockstats type day link enable
server tick.cs.unlv.edu
server tick.mtnlion.com
#server tick.jpunix.net
server ntp1.stsn.net
server north-america.pool.ntp.org
server time.apple.com
# beef security policy--see hpubuntu's /etc/ntp.conf
restrict default kod notrap nomodify nopeer noquery
restrict 127.0.0.1 nomodify
broadcast 192.168.1.255

attached images

• screenshot-system_clock_error_21oct08.png.jpg (61.3 kb, 0 views)

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