[time-nuts] Trimble Mini-T Timing Glitches

Tim Shoppa tshoppa at gmail.com
Thu Nov 30 15:01:40 EST 2017

Historical: Ancient (as in Trimble SVeeSix - 20 or more years ago) Trimble
GPS units would have their PPS timing output offset by several milliseconds
when they lost a sufficient number of satellites to maintain a 4D solution.

The PPS offset would jump back and forth by a large step (I recall six
milliseconds) when tracking was borderline.

I do not expect anything modern to have problems like this.

Tim N3QE

On Thu, Nov 30, 2017 at 2:35 PM, Keith Loiselle <keith.loiselle at gmail.com>

> Hello everyone,
> I have heard reports of Trimble Mini-T timing glitches with offsets of 1ms
> lasting for about 30 seconds several times during the past week.  Some of
> the dates and times reported are at various locations include:
> 23/11/2017, approx 11:00 UTC
> 29/11/2017, approx 11:00 UTC
> 30/11/2017, approx 12:00 UTC
> We have not observed glitches with any of the equipment we have running,
> but we have not had any Trimble units running during the past week.  Has
> anyone else observed similar glitches recently with Trimble or other GPS
> equipment?
> Thanks,
> Keith
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