[time-nuts] GPS Outage
Björn
bg at lysator.liu.se
Fri Feb 26 06:34:22 EST 2016
"The product will not report the correct extended GPS week number after the Feb,13th 2016.
After the rollover to week #860, the thunderbolt will not make position for 2 hours, because the Ephemeris data on the GPS receiver being consider incorrect.
The module will work fine after this 2 hours."
Have the Motorola Oncore/Navman/Jupiter receivers also been checked for this condition?
Strange that at least 3 independant firmware trees/development teams should chose the same magic wk860.
I guess that someone with both affected non-trimble receivers and a gps rf simulator would need to spend some time on this.
--
Björn
<div>-------- Originalmeddelande --------</div><div>Från: Martin Burnicki <martin.burnicki at burnicki.net> </div><div>Datum:2016-02-26 09:32 (GMT+01:00) </div><div>Till: time-nuts at febo.com </div><div>Rubrik: Re: [time-nuts] GPS Outage </div><div>
</div>Mark Sims wrote:
>> When is some organization going to explain what happened in February for almost two hours starting at 00:16 GMT? That subject has gone silent. Rob, NC0B
> I heard back from NAVCEN. They said it was a Trimble issue and that Trimble would contact me (they didn't). But that does not jive with reports of failures in Motorola, Navman, etc receivers.
I think we need to distinguish here.
The January 26 issue was due to faulty data sent by the satellites,
which caused GPS receivers to apply a wrong UTC correction which caused
the UTC time to be off by 13.7 us.
As explained by Luc Gaudin from http://naelcom.com (who obviously sell
Trimble GPS receivers) the February 13 issue was indeed just a Trimble
firmware problem. See:
https://www.febo.com/pipermail/time-nuts/2016-February/096042.html
https://www.febo.com/pipermail/time-nuts/2016-February/096050.html
Martin
_______________________________________________
time-nuts mailing list -- time-nuts at febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
More information about the time-nuts
mailing list