[time-nuts] December 6th? The mid-day Sun Spots blind the GPS

RadCom Technologies radcomtech at gmail.com
Fri Apr 13 14:15:04 EDT 2007


I have all the data on Dec 5-6th CME event.

Agreed on all excellent points.
**
*Including Software flaws-* I am very familiar
with software flaws and TRAIM errors;
although that has nothing to do with my Employer
or the Oscilloquartz Timing Products.

However, recheck your data for Dec 6th;
dont dismiss this CME ; *it was very large.*
In fact, this side of the globe picked up one h*ll of a sun-flare;
9 times larger than previous spikes, and in a low-cycle year too.
(at first I thought the April 4th media story was a April Fools or hoax- its
not)

=> Does anyone have TIE data for Dec 5~6th to about the 14th?
     interval of MJDates of (24)54075.8 to about (24)54083 or so?
=>  Can you share TIE data with me? Does that TIE show much walk?

Johnny


On 4/13/07, Magnus Danielson <cfmd at bredband.net> wrote:
>
> From: "RadCom Technologies" <radcomtech at gmail.com>
> Subject: [time-nuts] December 6th? The mid-day Sun Spots blind the GPS
> Date: Fri, 13 Apr 2007 08:39:01 -0400
> Message-ID: <c0fc4d530704130539p5924c8a8sdc275e864829b53a at mail.gmail.com >
>
> > John Radisch asks the group (in general)
> >
> > Had anyone observed any GPS outage of disturbance from
> > December 6th (2006) starting at about 3:45pm Eastern Time continuing
> through
> >
> > mid-December, subsiding about December 13th-14th?
> >
> > Any peculiar jumps in TIE or TDEV during this interval?
> >
> > I refer to the global record breaking burst starting that day
> > media reports, our own client reports from western Canada and so on
> >
> > My Colorado Springs Mil-Tech-friends say it did not effect SAASM's
>
> We had a paging system failed since all their GPS receivers failed around
> December 13th. They did not fail synchronously but within a day all
> failed.
> All receivers continued to fail until replaced in Jan/Feb. We do _NOT_
> suspect
> the sunburst activity (which wasn't THAT big) to cause these failures.
> Suspicion has been drawn towards other events. Also, we looked at the
> magentometer values of ESRANGE in Kiruna (North of Sweden) and it had the
> normal background levels prior to failures and some of the recievers
> failed
> well in advance of the big magnetometer deviations. Not all sun-burts
> causes
> issues with magnetometric values. We also checked the ionospheric
> deviations
> (as measured using L1/L2 GPS and GLONASS receivers globaly) in that whole
> period and no excess levels was actually detected.
>
> Yes, sun-spot burst can cause some problems. You *do* have to check the
> actual
> data and there is alot of publicly available measurements which you can
> check
> with and correlate with.
>
> IMHO you also need to consider software bugs and correlation to events in
> GPS almanack and current view of constellation to see possible
> explanaition.
>
> The GPS vendor claimed sunspots, but when confronted with other proofs,
> they
> concluded that it _could_ be due to software issues. Sadly enought we have
> not
> been able to finally conclude what happend. It is easy to say sun-spots,
> there
> are certainly people advocating for that since it is a danger they feel is
> not
> taken into account. While it *could* be sun-spots, there are also several
> other
> things to consider. So look in wider circles, what is the big picture
> saying.
>
> We had a nation wide network fail at about that time. It has not been
> consistently concluded to be either sun-spots or software, but we have
> reasons
> to suspect the later. It still remains to be verified.
>
> You will certainly see effects due to sun-spots when those deviations
> occured.
> I am interested in hearing about receivers that failed misserably in that
> time-frame. It would be strange if it only affected one operator in one
> country. These where old devices, but at least some time-nut should have
> one of
> these operating. I know of one who has them, but not in current operation.
>
> Cheers,
> Magnus
>



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