[ntp:questions] garmin 18x and linux

Chris Albertson albertson.chris at gmail.com
Thu Sep 8 19:49:09 UTC 2011


On Mon, Sep 5, 2011 at 6:25 AM, Miroslav Lichvar <mlichvar at redhat.com> wrote:
> On Sat, Sep 03, 2011 at 08:05:21AM -0500, steven Sommars wrote:
>> I monitored Garmin LVC (corrected firmware) NMEA time and saw variance of up
>> to 50msec.  I wonder if the variation in NMEA time depends on GPS signal
>> quality.
>
> I'm wondering what is the cause of the variance too.
>
> With 18x LVC (firmware 3.70) I see errors up to 150 ms. That
> wouldn't be that bad if it was randomly distributed.
>
> A capture over 30 hours:
> http://mlichvar.fedorapeople.org/tmp/18x_nmea.png
>
> --
> Miroslav Lichvar
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-- 

Chris Albertson
Redondo Beach, California



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