RPI + Adafruit GPS sanity check

Hal Murray hmurray at megapathdsl.net
Sat May 18 07:22:24 UTC 2019

201905-ntpsec at jslf.app said:
> This is because although the GPS chip knows where and when it is, there is
> much jitter in conveying that time info to any userland process -- i.e.
> encoding into NMEA + transmission over 9600 baud serial line + kernel to user
> land + decoding.

> The instability in the offset is due to what? It's not the online-average of
> the lag since NTP started. 

The basic problem is that the people who wrote the software weren't interested 
in time, probably because it wasn't in the specs.

These are my opinions.  I hate spam.

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