Hi Earlier this month a gamma event occurred that now has the name BOAT ( Biggest Of All Time ). https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html <https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html> It did have a measured impact on propagation: https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/ <https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/> The question is, did it impact GNSS systems and the delivery of time? Was there a “glitch” observed as a result? So far, I have not seen any mention of a timing ( or a nav ) issue. Bob

And, please note that it originated only 2.4 billion light years away. Closer things could be even more interesting. --- Graham == On Fri, Oct 21, 2022 at 8:49 AM Bob kb8tq via time-nuts < time-nuts@lists.febo.com> wrote: > Hi > > Earlier this month a gamma event occurred that now has the name BOAT ( > Biggest Of All Time ). > > > https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html > < > https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html > > > > It did have a measured impact on propagation: > > > https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/ > < > https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/ > > > > The question is, did it impact GNSS systems and the delivery of time? Was > there a “glitch” > observed as a result? So far, I have not seen any mention of a timing ( or > a nav ) issue. > > Bob > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

On 21/10/2022 13:16, Bob kb8tq via time-nuts wrote: > Hi > > Earlier this month a gamma event occurred that now has the name BOAT ( Biggest Of All Time ). > > https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html <https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html> > > It did have a measured impact on propagation: > > https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/ <https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/> > > The question is, did it impact GNSS systems and the delivery of time? Was there a “glitch” > observed as a result? So far, I have not seen any mention of a timing ( or a nav ) issue. > > Bob I recall seeing this mentioned at the time, but I didn't see any effects here in Edinburgh - at least according to what my u-blox MAX-M8Q-0-10 reported. I keep an eye on SNR and DOP: https://www.satsignal.eu/mrtg/performance_gps_dop.php but with the event being a week ago only 2-hour average data now remains. The Phys.org site doesn't allow a cookie opt-out, which I don't like. The time is mentioned just as "early in the morning". What time zone might that be? UTC? It gives a date of October 14. Am I misreading that? The spaceweather site says October-09? At least the time on the graph is in UTC. Two different events? Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@blueyonder.co.uk Twitter: @gm8arv

Hi My understanding is that the initial burst happened October 8 / 9 ( depending on time zone) and that they have been looking at the “ramp down” on the burst ever since. Based on the chart on the Space Weather site ( and reproductions of the same data elsewhere), the initial burst was pretty impressive. It’s also the sort of thing that simply is impossible to put into a GPS broadcast propagation model. That’s what got me wondering if there had been some sort of effect. Indeed this would be a lot easier to dig into if the world in general caught word of it a bit sooner. Unfortunately, I only noticed an article about it well after the initial burst happened. Bob > On Oct 21, 2022, at 11:03 AM, David Taylor via time-nuts <time-nuts@lists.febo.com> wrote: > > On 21/10/2022 13:16, Bob kb8tq via time-nuts wrote: >> Hi >> Earlier this month a gamma event occurred that now has the name BOAT ( Biggest Of All Time ). >> https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html <https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html> >> It did have a measured impact on propagation: >> https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/ <https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/> >> The question is, did it impact GNSS systems and the delivery of time? Was there a “glitch” >> observed as a result? So far, I have not seen any mention of a timing ( or a nav ) issue. >> Bob > > I recall seeing this mentioned at the time, but I didn't see any effects here in Edinburgh - at least according to what my u-blox MAX-M8Q-0-10 reported. I keep an eye on SNR and DOP: > > https://www.satsignal.eu/mrtg/performance_gps_dop.php > > but with the event being a week ago only 2-hour average data now remains. > > The Phys.org site doesn't allow a cookie opt-out, which I don't like. > > The time is mentioned just as "early in the morning". What time zone might that be? UTC? It gives a date of October 14. Am I misreading that? > > The spaceweather site says October-09? At least the time on the graph is in UTC. > > Two different events? > > Cheers, > David > -- > SatSignal Software - Quality software for you > Web: https://www.satsignal.eu > Email: david-taylor@blueyonder.co.uk > Twitter: @gm8arv > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

The burst (or effects) were observed 1320 UTC on the 9th. (First graph in the Space weather article from the first mail https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/ ). I found I needed to read the graph text carefully. On first look, I thought I would check data around 2100 UTC. I don't have much data logged, but had a quick look and saw nothing significant on the 9th. Data I have logged is GPS satellite signal strength (from a poorly located GPS module) NTP clock data from the GPS, 4G/LTE modem logs. Effects observed on Earth were VLF. I used to log error data from my DSL modem, DSL lines make a decent VLF antenna... It could detect thunderstorms and other VLF interference. Unfortunately, my ISP stopped providing DSL to my area last summer so I had to move to 4G/LTE. In the absence of other interference, it may have been observable in DSL error rates. Here is an example from a thunderstorm a couple years ago. https://twitter.com/mike011235/status/1278063691141992450 Best regards... ...Mike On Sat, Oct 22, 2022 at 1:02 PM Bob kb8tq via time-nuts < time-nuts@lists.febo.com> wrote: > Hi > > My understanding is that the initial burst happened October 8 / 9 ( > depending on time zone) > and that they have been looking at the “ramp down” on the burst ever > since. > > Based on the chart on the Space Weather site ( and reproductions of the > same data elsewhere), > the initial burst was pretty impressive. It’s also the sort of thing that > simply is impossible to > put into a GPS broadcast propagation model. That’s what got me wondering > if there had > been some sort of effect. > > Indeed this would be a lot easier to dig into if the world in general > caught word of it a bit > sooner. Unfortunately, I only noticed an article about it well after the > initial burst happened. > > Bob > > > On Oct 21, 2022, at 11:03 AM, David Taylor via time-nuts < > time-nuts@lists.febo.com> wrote: > > > > On 21/10/2022 13:16, Bob kb8tq via time-nuts wrote: > >> Hi > >> Earlier this month a gamma event occurred that now has the name BOAT ( > Biggest Of All Time ). > >> > https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html > < > https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html > > > >> It did have a measured impact on propagation: > >> > https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/ > < > https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth/ > > > >> The question is, did it impact GNSS systems and the delivery of time? > Was there a “glitch” > >> observed as a result? So far, I have not seen any mention of a timing ( > or a nav ) issue. > >> Bob > > > > I recall seeing this mentioned at the time, but I didn't see any effects > here in Edinburgh - at least according to what my u-blox MAX-M8Q-0-10 > reported. I keep an eye on SNR and DOP: > > > > https://www.satsignal.eu/mrtg/performance_gps_dop.php > > > > but with the event being a week ago only 2-hour average data now remains. > > > > The Phys.org site doesn't allow a cookie opt-out, which I don't like. > > > > The time is mentioned just as "early in the morning". What time zone > might that be? UTC? It gives a date of October 14. Am I misreading that? > > > > The spaceweather site says October-09? At least the time on the graph > is in UTC. > > > > Two different events? > > > > Cheers, > > David > > -- > > SatSignal Software - Quality software for you > > Web: https://www.satsignal.eu > > Email: david-taylor@blueyonder.co.uk > > Twitter: @gm8arv > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe send an email to time-nuts-leave@lists.febo.com > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

If it can be of any use, I am continuously (as long as no power failure occurs in the lab as e.g. beginning of this month !) monitoring DCF77 phase code wrt GPS L1 C/A delay from a location 370 km from Mainflingen since 2016 (see https://hal.archives-ouvertes.fr/hal-02134480/document), one measurement every 5 min. I can only keep the result of processing (time of flight) and not all raw data for available storage limitations. Attached to this email is a zoom on Oct. 2022. Red is sliding average on 10 samples of blue. The raw data are at http://jmfriedt.org/moyenne4, with first column the unix time (s) and the second column the DCF77-GPS delay -- I cannot see any obvious impact other than sunrise/sunset but maybe more clever processing can extract information. Best, JM -- JM Friedt, FEMTO-ST Time & Frequency, 26 rue de l'Epitaphe, 25000 Besancon, France October 23, 2022 2:44 PM, "Michael Gindonis via time-nuts" <time-nuts@lists.febo.com> wrote: > The burst (or effects) were observed 1320 UTC on the 9th. (First graph in > the Space weather article from the first mail > https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth > ). I found I needed to read the graph text carefully. On first look, I > thought I would check data around 2100 UTC. > > I don't have much data logged, but had a quick look and saw nothing > significant on the 9th. Data I have logged is GPS satellite signal strength > (from a poorly located GPS module) NTP clock data from the GPS, 4G/LTE > modem logs. > > Effects observed on Earth were VLF. > > I used to log error data from my DSL modem, DSL lines make a decent VLF > antenna... It could detect thunderstorms and other VLF interference. > Unfortunately, my ISP stopped providing DSL to my area last summer so I had > to move to 4G/LTE. In the absence of other interference, it may have been > observable in DSL error rates. > > Here is an example from a thunderstorm a couple years ago. > https://twitter.com/mike011235/status/1278063691141992450 > > Best regards... > > ...Mike > > On Sat, Oct 22, 2022 at 1:02 PM Bob kb8tq via time-nuts < > time-nuts@lists.febo.com> wrote: > >> Hi >> >> My understanding is that the initial burst happened October 8 / 9 ( >> depending on time zone) >> and that they have been looking at the “ramp down” on the burst ever >> since. >> >> Based on the chart on the Space Weather site ( and reproductions of the >> same data elsewhere), >> the initial burst was pretty impressive. It’s also the sort of thing that >> simply is impossible to >> put into a GPS broadcast propagation model. That’s what got me wondering >> if there had >> been some sort of effect. >> >> Indeed this would be a lot easier to dig into if the world in general >> caught word of it a bit >> sooner. Unfortunately, I only noticed an article about it well after the >> initial burst happened. >> >> Bob >> >> On Oct 21, 2022, at 11:03 AM, David Taylor via time-nuts < >> time-nuts@lists.febo.com> wrote: >> >> On 21/10/2022 13:16, Bob kb8tq via time-nuts wrote: >> Hi >> Earlier this month a gamma event occurred that now has the name BOAT ( >> Biggest Of All Time ). >> >> https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html >> < >> https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html >> >> It did have a measured impact on propagation: >> >> https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth >> < >> https://spaceweatherarchive.com/2022/10/17/powerful-gamma-ray-burst-made-currents-flow-in-the-earth >> >> The question is, did it impact GNSS systems and the delivery of time? >> Was there a “glitch” >> observed as a result? So far, I have not seen any mention of a timing ( >> or a nav ) issue. >> Bob >> >> I recall seeing this mentioned at the time, but I didn't see any effects >> here in Edinburgh - at least according to what my u-blox MAX-M8Q-0-10 >> reported. I keep an eye on SNR and DOP: >> >> https://www.satsignal.eu/mrtg/performance_gps_dop.php >> >> but with the event being a week ago only 2-hour average data now remains. >> >> The Phys.org site doesn't allow a cookie opt-out, which I don't like. >> >> The time is mentioned just as "early in the morning". What time zone >> might that be? UTC? It gives a date of October 14. Am I misreading that? >> >> The spaceweather site says October-09? At least the time on the graph >> is in UTC. >> >> Two different events? >> >> Cheers, >> David >> -- >> SatSignal Software - Quality software for you >> Web: https://www.satsignal.eu >> Email: david-taylor@blueyonder.co.uk >> Twitter: @gm8arv >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com >> To unsubscribe send an email to time-nuts-leave@lists.febo.com >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com >> To unsubscribe send an email to time-nuts-leave@lists.febo.com > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com