Ntrip varying a lot

[PotatoFarmer]

Its as good as you can expect for $150, though if the harxon has actual analysis documentation for not too much more it could be better.

[Gabriel_C (GCG)]

It was only a few years ago that when planning observations, it would be essential to use a planning tool to avoid spikes in DOP. For instance, if I look at GPS for today at my location, there’s a huge spike around 11:00. Maybe you can take a look and see if there’s a trend in your area, times to avoid working.

[geohawk]

Great point @Gabriel_C
Something I didn’t see mentioned here is that space weather plays a large role in random RTK error.
The ionosphere isn’t a friend to GNSS signals.
So, while it would be easy to point at software, remember that it is using well-known and long-applied algorithms, libraries and protocols.

The odds are that larger [random] errors are caused by CME’s. We had a big one recently, and if you didn’t know about it, you might have just discovered what happens during a decent EM storm.

[EBE111057 (Bryan Enfinger)]

https://www.swpc.noaa.gov/communities/global-positioning-system-gps-community-dashboard

[geohawk]

@EBE111057 - Exactly the site I check before every project.
I think it should be on everyone’s SOP for every planning and execution checklist.

[svetlana.nikolenko]

Hi there,

Gabriel’s version about DOP spikes sounds most likely to me as well.

Mauricio, still, if you want an in-depth investigation, I’m always ready to help!