NTRIP and RTK guides
Short, practical guides for getting RTK corrections from public NTRIP casters — written alongside the SurvSupport map of 3833 public stations.
Free public NTRIP casters
Live list of free and public NTRIP casters for RTK corrections — RTK2Go, Centipede-RTK, EUREF-IP, IGS, SAPOS and more — with station counts, caster addresses and how to log in.
How to connect an RTK rover to an NTRIP caster
Step-by-step: find a nearby base station, enter caster host, port, mountpoint and login in your NTRIP client, send GGA when required, and fix the usual connection errors.
What is NTRIP?
NTRIP explained: how base stations, casters and rovers stream RTCM corrections over the internet, what a source table and mountpoint are, and how far you can be from a base.