[time-nuts] GPS outage?

John C. Westmoreland, P.E. john at westmorelandengineering.com
Sat Sep 7 01:41:45 UTC 2013


Lisa,

Thanks for this update.  How many Resolution-T receivers are out there?

Not to go off on another tangent - but I have heard something about 'GPS
jamming during the America's Cup'.  Hmmm.

Regards,
John Westmoreland



On Fri, Sep 6, 2013 at 8:54 AM, Lisa Perdue <perdue.lisa at gmail.com> wrote:

> Trimble has confirmed to us that the nonstandard outage on PRN 4 (SVN 34)
> may have caused the Resolution-T receivers to perform a reset and then
> return to normal operation. They are investigating the cause but it does
> explain why only some people experienced the event. Other Trimble receivers
> and other manufacturers seem unaffected.
>
>
> On Thu, Sep 5, 2013 at 10:34 PM, Brian, WA1ZMS <wa1zms at att.net> wrote:
>
> > Guys-
> >
> > Please forgive me for the BW......
> >
> > My day-job mgmt. has also asked me today if I knew of any US regional GPS
> > "issues", as we too have had several reports of
> > our customers systems going into Rb hold-over on or about the 4th of
> Sept.
> > Only fact I can find is that SVN 4 was noted as
> > an issue via:
> http://adn.agi.com/SatelliteOutageCalendar/SOFCalendar.aspx
> > But that can't be the root cause.
> >
> > At work, I am now the "go-to-guy" for ANYTHING GPS related since I'm a
> > Time-Nut and we have customers who depend on
> > GPS timing for their  comm. systems;  and for reasons I cannot go into
> here
> > on this reflector.
> >
> > So like Brad.....I too have anecdotal reports of issues.  The sky is not
> > falling, nor was it a serious issue.
> > However if anyone has info that they cannot share via the reflector, a
> > private reply would be much appreciated.
> > I am not looking for info that cannot be openly shared. But if anyone has
> > hint or clue, I would much appreciate it.
> >
> > BTW....my GPS receivers here in VA seemed to have had no issue. Go
> figure.
> >
> > -Brian, WA1ZMS
> >
> >
> >
> > -----Original Message-----
> > From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> > Behalf Of Brad Dye
> > Sent: Wednesday, September 04, 2013 6:14 PM
> > To: Time Nuts
> > Subject: [time-nuts] GPS outage?
> >
> > Readers of my newsletter are reporting a strange interruption of their
> GPS
> > reception yesterday -- mainly in the northeastern US but also in SC. This
> > is
> > my first day on this mailing list -- for a while -- so I don't know if
> this
> > has been discussed or reported previously. Has anyone else noticed this?
> We
> > are trying to find out is there was some sort of system-wide issue or
> maybe
> > if it was local interference possibly caused by those GPS jammers that
> some
> > of the truckers have been using.
> >
> > By the way, my newsletter is mostly about Paging, and we use GPS/DOs to
> > keep
> > the paging transmitters (in simulcast mode) synchronized and on
> frequency.
> >
> > Best regards,
> >
> > Brad Dye, K9IQY
> > Editor, Wireless Messaging News
> > P.O. Box 266
> > Fairfield, IL  62837 USA
> > Telephone: 618-599-7869
> > Skype: braddye
> > http://www.braddye.com
> >
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