We are talking parts in the -9th but I am using a hp3801 and the general software that lets you see the 1 sec variation. I had never seen this behavior before and thought the oscillator must be in trouble. Measured it against a local RB and it was stable. Then it hit me, could this actually be the effects of the aurora? I am thinking it just might be. Regards Paul

On 1/26/12 2:08 PM, paul swed wrote: > We are talking parts in the -9th but I am using a hp3801 and the general > software that lets you see the 1 sec variation. > I had never seen this behavior before and thought the oscillator must be in > trouble. Measured it against a local RB and it was stable. > Then it hit me, could this actually be the effects of the aurora? > I am thinking it just might be. > Regards > Paul > _ google for "Space Weather Effects on GPS" there's a presentaton by Thomas Bogdan at the Space Weather Prediction Center that gives you some numbers to work with. 10s of meters effects aren't unusual.

Yup just the first time I have seen the pps this crazy But as we speak its settling down. So it was an effect for about an hour. Regards Paul. On Thu, Jan 26, 2012 at 5:59 PM, Jim Lux <jimlux@earthlink.net> wrote: > On 1/26/12 2:08 PM, paul swed wrote: > >> We are talking parts in the -9th but I am using a hp3801 and the general >> software that lets you see the 1 sec variation. >> I had never seen this behavior before and thought the oscillator must be >> in >> trouble. Measured it against a local RB and it was stable. >> Then it hit me, could this actually be the effects of the aurora? >> I am thinking it just might be. >> Regards >> Paul >> _ >> > > google for "Space Weather Effects on GPS" > > there's a presentaton by Thomas Bogdan at the Space Weather Prediction > Center that gives you some numbers to work with. > > 10s of meters effects aren't unusual. > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. >

Is there something you could record to document this? Odd SNR on a bird? -----Original Message----- From: paul swed <paulswedb@gmail.com> Sender: time-nuts-bounces@febo.com Date: Thu, 26 Jan 2012 18:15:27 To: Discussion of precise time and frequency measurement<time-nuts@febo.com> Reply-To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Subject: Re: [time-nuts] GPS tick all over the place. Suspect aurora effects Yup just the first time I have seen the pps this crazy But as we speak its settling down. So it was an effect for about an hour. Regards Paul. On Thu, Jan 26, 2012 at 5:59 PM, Jim Lux <jimlux@earthlink.net> wrote: > On 1/26/12 2:08 PM, paul swed wrote: > >> We are talking parts in the -9th but I am using a hp3801 and the general >> software that lets you see the 1 sec variation. >> I had never seen this behavior before and thought the oscillator must be >> in >> trouble. Measured it against a local RB and it was stable. >> Then it hit me, could this actually be the effects of the aurora? >> I am thinking it just might be. >> Regards >> Paul >> _ >> > > google for "Space Weather Effects on GPS" > > there's a presentaton by Thomas Bogdan at the Space Weather Prediction > Center that gives you some numbers to work with. > > 10s of meters effects aren't unusual. > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

I can look but I don't think this program will do anything like that. On Thu, Jan 26, 2012 at 6:25 PM, <lists@lazygranch.com> wrote: > Is there something you could record to document this? Odd SNR on a bird? > > -----Original Message----- > From: paul swed <paulswedb@gmail.com> > Sender: time-nuts-bounces@febo.com > Date: Thu, 26 Jan 2012 18:15:27 > To: Discussion of precise time and frequency measurement< > time-nuts@febo.com> > Reply-To: Discussion of precise time and frequency measurement > <time-nuts@febo.com> > Subject: Re: [time-nuts] GPS tick all over the place. Suspect aurora > effects > > Yup just the first time I have seen the pps this crazy > But as we speak its settling down. So it was an effect for about an hour. > Regards > Paul. > > On Thu, Jan 26, 2012 at 5:59 PM, Jim Lux <jimlux@earthlink.net> wrote: > > > On 1/26/12 2:08 PM, paul swed wrote: > > > >> We are talking parts in the -9th but I am using a hp3801 and the general > >> software that lets you see the 1 sec variation. > >> I had never seen this behavior before and thought the oscillator must be > >> in > >> trouble. Measured it against a local RB and it was stable. > >> Then it hit me, could this actually be the effects of the aurora? > >> I am thinking it just might be. > >> Regards > >> Paul > >> _ > >> > > > > google for "Space Weather Effects on GPS" > > > > there's a presentaton by Thomas Bogdan at the Space Weather Prediction > > Center that gives you some numbers to work with. > > > > 10s of meters effects aren't unusual. > > > > ______________________________**_________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to https://www.febo.com/cgi-bin/** > > mailman/listinfo/time-nuts< > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >

> google for "Space Weather Effects on GPS" > > there's a presentaton by Thomas Bogdan at the Space Weather Prediction > Center that gives you some numbers to work with. > > 10s of meters effects aren't unusual. There's a wonderful example of GPS timing and space weather in a paper by fellow time-nuts Rick Hambly and Tom Clark. Rick was calibrating a set of Motorola Oncore receivers at USNO and happened to capture the massively disrupting effect of a rare Aurora on September 7, 2002. There's a mention of this in his paper: http://www.gpstime.com/files/PTTI/PTTI_2002_CNS_Testbed.pdf But the best part are the sky photos and plots on page 17 and 18 here: http://www.gpstime.com/files/PTTI/PTTI_2002_CNS_Testbed_VG.ppt /tvb

Tom Van Baak said the following on 01/26/2012 08:24 PM: >> google for "Space Weather Effects on GPS" >> >> there's a presentaton by Thomas Bogdan at the Space Weather Prediction >> Center that gives you some numbers to work with. >> >> 10s of meters effects aren't unusual. > > There's a wonderful example of GPS timing and space weather in a > paper by fellow time-nuts Rick Hambly and Tom Clark. > > Rick was calibrating a set of Motorola Oncore receivers at USNO and > happened to capture the massively disrupting effect of a rare Aurora > on September 7, 2002. > > There's a mention of this in his paper: > http://www.gpstime.com/files/PTTI/PTTI_2002_CNS_Testbed.pdf > > But the best part are the sky photos and plots on page 17 and 18 here: > http://www.gpstime.com/files/PTTI/PTTI_2002_CNS_Testbed_VG.ppt Not nearly as pretty, but I caught a major flare in 2006 in some GPS signal strength data that I was recording at the time: http://febo.com/pages/gps_solar_flare/index.html John