[ntp:questions] garmin 18x and linux

Steve Kostecke kostecke at ntp.org
Mon Sep 5 16:33:32 UTC 2011

On 2011-09-05, 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.

NMEA sentences are emitted when the GPS receiver is not busy with other
things. So observed jitter is not suprising.

Steve Kostecke <kostecke at ntp.org>
NTP Public Services Project - http://support.ntp.org/

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