[time-nuts] Re: Tonga effect on GPS

[Lux, Jim]

On 2/7/22 12:46 PM, Kevin Rowett wrote:
> Interesting data…
>
>
> Can someone put the disturbance in perspective?  How much would this affect navigation, or timing, and how large (or small) is this disturbance in magnitude as compared to other events (CMEs?).

looks like a small single digit variation in TECU.

Compare to CMEs which look more like ~10 of TECU variation


https://angeo.copernicus.org/preprints/angeo-2019-39/angeo-2019-39.pdf

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2008RS004029

It's not clear on a cursory reading of the above whether the change is 
due to the UV or the particles.

I'll ask the JPLer who did the analysis, if I can figure out who did it. 
They're not credited in the news release.


> KR, K6TD
>
>
>> On Feb 7, 2022, at 11:43 AM, John Moran, Scawby Design <john at scawbydesign.co.uk> wrote:
>>
>> Someone suggested this a while ago, this may be of interest -
>>
>> https://phys.org/news/2022-02-tonga-eruption-ripples-earth-ionosphere.html
>>
>> John
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