[time-nuts] Re: BOAT

[Bob kb8tq]

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 at 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
> -- 
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