[time-nuts] GPS outage?

John C. Westmoreland, P.E. john at westmorelandengineering.com
Sat Sep 7 03:36:44 UTC 2013


Fellow Time Nuts:

Is this a site to be trusted?:

http://adn.agi.com/SatelliteOutageCalendar/SOFCalendar.aspx

Regards,
John W.


On Fri, Sep 6, 2013 at 6:41 PM, John C. Westmoreland, P.E. <
john at westmorelandengineering.com> wrote:

> 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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