For my work, I use the RTCM stream from my International GNSS Service as base input stream for my REACH rover to do RTK.
To get the base coordinates for input into ReachView, I run a separate RTKNAVI on my home desktop computer, with the base station as the input stream, set on Static PPP with and once the coordinates are resolved to <0.5 cm precision (usually through the night, set to ionosphere free LC since the base stations have L1 and L2 GPS, GLONASS, Beidou and Galileo), I input the coordinates in ReachView. In my experience, it has given me very accurate RTK float solution but I have to re-obtain the coordinates before every session of data collecting with REACH as I notice the PPP solution of the base station is drifting (> 10 cm within a few months).
Continental drift is at most 1-2 cm a year where I am at (Sunda Plate), anyone has any idea why the coordinate drift is so drastic?
You can see the ntrip caster table in mgex.igs-ip.net. I tap on the stream SIN17.