Ubuntu 16.04 with ntpd using NEMA/PPS..

[Nils Kassube]

Howard Leadmon wrote:
> server 127.127.20.0 mode 16 minpoll 3 prefer
> fudge 127.127.20.0 flag1 1 flag2 1 flag3 1 time1 0.0

AIUI that's the entry for GPS, but you would also need a server for PPS 
like

server 127.127.22.0 ...

See "/usr/share/doc/ntp-doc/html/drivers/driver22.html" from the package 
ntp-doc.


Nils