@Xrave who actually gets 99.9% rrr ? seems impossible. I have a flawless setup, maximum coverage, always online with fiber internet service always on

@minerbob it’s extremely hard to do it in North America. I think there are about ~250 stations that have achieved it.

However almost all of my stations in Europe and Asia are at 100% RRR; there’s just a lot more satellites.

@Xrave How much is the bonus? Is it worth chasing or worrying about?

@minerbob it varies each epoch. For this epoch it’s about 53 geod.

I’ve also had some epochs where it is ~200 geod.

@Xrave hmm, ok. thanks

@JoeX9977 not really random, but you should consider it random.

They use an algorithm to select stations within a certain distance of each other to form the “backbone” chain, which has to deal with ensuring their global RTK performance.

They will switch the stations each epoch and “randomly” choose stations that are eligible, however a station in a bad location might never be eligible depending on its relative position to other stations in the backbone.

They have not shared the backbone equation or selection logic algorithms, even with much complaint about it during the GIP process.

@Xrave Makes sense… thanks for the great explanation!