[ntp:questions] GPS clock for Linux
hal-usenet at ip-64-139-1-69.sjc.megapath.net
Fri Sep 12 20:42:38 UTC 2008
In article <ko8qp5-po8.ln1 at klein-habertwedt.de>,
Uwe Klein <uwe_klein_habertwedt at t-online.de> writes:
>Hal Murray wrote:
>> There are a lot of low cost USB GPS gizmos that use the
>> SiRF Star III. They suck for timekeeping.
>Is there a reason known for this?
I assume it's a software bug/feature. The problem is drift/wander
in the offset. The offset changes too slowly for normal
jitter filters to work on it.
I forgot to mention another problem with those chipsets.
They have a leap second bug.
These are my opinions, not necessarily my employer's. I hate spam.
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