[ntp:questions] Too much offset from GPS?

Nero Imhard nim at pipe.nl
Fri Mar 7 23:51:55 UTC 2008

chowalit.lab Chowalit Lab Linux wrote:
>   My GPS have offset lower than other stratum 1 server ?? .......

This is, or should be, a FAQ.

NMEA output is unusable as a time source.

The time in an NMEA sentence tells you at what time the stated position 
etc. was measured, but not the current time. There is no time marker (no 
*now*) in NMEA.

Experimentally finding an offset and fudging it away (hoping that the 
offset will be constant) just cannot be a substitute for a proper and 
well-defined time source.


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