Does having multiple bases improve accuracy?

[Adcade (Adrián Carreño Demartini)]

Hello
Currently in my job we have 2 Reach RS and many Reach modules, and in the RTK settings of both there is a field for additional correction input. I was wondering if I could set both my Reach RS as base stations (connected to a wifi extender so range isn’t an issue) and make my Reach modules get corrections from both bases. Will it improve accuracy, AR validaton ratio, time response or anything?

[bide]

In short, no. RTKLIB will not handle more than one base.

Moreover, the rover is more likely to have the poorer satellite view compared to the base. As such, duplicate corrections from two bases with the same satellites would not really be contributing anything new to the calculation. On the contrary, it may create more doubt as to the rover position.

[quote=“rant”]For example, if two bases were in use simultaneously by one rover and if the published coordinates of those two base locations were not perfectly precise; and I think that is a reasonable assumption to make; then some error would be introduced.

Say that the published coordinates declare the bases to be 100m apart, but on this day RTK shows them to be 100.1m apart, now before you even start, your rover would be struggling with a 10cm error. “Hey, why is my ellipse of error twice as large when I use two bases?” This particular problem has got to do with those published coordinates, and not your point collection task, and so it should not burden or delay your field work. It is better suited to deal with it back at the office where you can double-check the published coordinates and do some post-processing to determine if all the points collected have the same 10cm offset when processed from the two different base locations.

This is just an opinion of course. Feel free to rebut.[/quote]

Required reading:
(Here, it seems I am repeating myself, but pay attention to Luke’s post.)

Using 3 Reach?

Is it possible to use 2 base units to increase the accuracy of the rover? Either feeding 2 correction streams to the rover, or feeding corrections from 1 base unit to the other base unit? It seems that the units share data on the satellite feeds, so it seems that having more feeds for the rover would increase accuracy or reduce time to get a fixed position.

Additional reading:

Reach for GCPs, PPK, A6000

Hi, I’m looking forward to start my adventure with using Emlid’s products. Meanwhile, I have some rookie questions that I’d appreciate being answered. I’ll be using it for GCPs placement instead of expensive gps rtk l1/l2 solution that is not always available to our team. 1.I was wondering why Luke Wijnberg used two bases. They offer much better results right? (Like in his table - first differences column would be the results with one base, and the second with two bases?) Am I interpreting i…

UAV GCP Survey

Please enlighten me as to why one would want a rover to process from two base stations in real time. I can understand the opposite case where one would want to broadcast from one base station to multiple rovers.

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For your question about additional corrections:

Link to the docs:
https://docs.emlid.com/reachrs/common/reachview/correction-input/

[kevinnem]

Forgive me if I am wrong… but is there not some sort of free version of network processing software that would allow multiple base stations?
I was thinking you could drop multiple base stations, feed them all in to a NTRIP server, and then it would pipe out the networked RTK corrections as a VRS?