[gpsd-users] ntpd with gpsd syncronization

[Yakov Shmulevich]

Hello All,

I have an USB GPS receiver with 1PPS wired to DCD_IN and I want to configure CentOs ntpd to use this module.

In accordance with gpsd documentation I need to edit /etc/ntp.conf  with addition of follow lines:

server 127.127.28.0 
fudge 127.127.28.0 time1 0.420 refid GPS
server 127.127.28.1 prefer
fudge 127.127.28.1 refid GPS1

Please, help me to understand the "time1" parameter. 

How I should define this value? How it influence on NTP time accuracy?

As I understand the such GPS receiver give 1ms accuracy. What will be the NTP time accuracy in this case?

Help would be much appreciated...


Thanks