[Talk-us] Website showing the best time to survey with GPS.

[Eric H. Christensen]

I use GPSr devices other than what's in my smartphone.  The point is that if all the satellites are clustered directly overhead the diversity isn't great enough to give a truly accurate position on the ground.  For best surveying with a GPSr, you want satellites to not only be overhead but toward the horizon (and everywhere in between) as well.

Eric

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Thursday, June 27, 2019 2:15 AM, Mateusz Konieczny <matkoniecz at tutanota.com> wrote:

> Note that for a typical GPS, especially GPS in smartphone I would expect that
> this effects will be not really noticeable in affecting accuracy.
>
> Maybe except massive solar storms like
> https://en.wikipedia.org/wiki/Solar_storm_of_1859
>
> I tried to check sources, but quick search found nothing really good, except some things
> like
> https://www.utdallas.edu/news/2013/5/16-23761_Solar-Flares-May-Interrupt-GPS-Navigation-Research_article-wide.html
> "If a flare is particularly large, the resulting turbulence in our upper atmosphere
> could disrupt radio signals and GPS navigation, for example."
>
> what seems to confirm that you need really unusual activity to have results.
>
> 27 Jun 2019, 00:18 by talk-us at openstreetmap.org:
>
>> I was told there was a website that forecasted the best times to do survey work with GNSS based upon diversity of satellites in the sky, solar activity, etc. Does anyone know what site this is?
>>
>> Thanks,
>> Eric
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