Every public RTK base station we can find, polled every 10 minutes. Position, format, authentication, fee and 30-day uptime: and an open list your receiver can read by itself.
What grows here is the availability record of the community RTK network: every 10 minutes we ask each caster which stations are alive, and we keep that answer. Nobody else keeps this history, and a missed 10 minutes can never be re-observed. We do not store raw RTK correction data (RTCM): that recording stopped in July 2026; what was already collected is kept permanently.
| # | Station | Country | Caster | Score | MSM | GNSS | bps | Receiver | Uptime | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| Loading… | ||||||||||
A base station is a receiver that sits still at a position already known to the centimetre. It watches the same satellites you do, compares what it measures against what it should measure, and broadcasts the difference.
Take that difference away from your own measurement and the errors you share, the ionosphere and the atmosphere above both of you, cancel out. That is how a position goes from metres to centimetres.
The cancellation only works while you and the station look through the same sky. As the gap grows, less of the error is shared, and less of it disappears.
Within 10 km you can expect centimetres. Past 20 km it gets harder to hold a fixed solution, and beyond 50 km it usually will not fix at all. The circles on the map show these two limits.
So the useful question is not which station is best, but which station is near you.
Uptime is how often the station answered over the last 30 days. Low uptime does not mean a bad station, but it does mean you should not plan a day's work around it.
Format tells you what it broadcasts. Newer message sets carry more constellations, which matters where the sky is narrow.
Authentication and fee tell you whether you can simply connect. Many are open with no account at all.
Almost every station here was put up by someone who did not have to. A university, a surveyor, a farmer, a person with spare equipment. They pay for the hardware and the connection, and they let strangers use it.
So connect politely. Do not hold a session open longer than you need, and do not leave a test connection running for days. If a station disappears, that is somebody's equipment failing, not a service outage.
Every ten minutes we ask each caster which stations are alive and keep the answer. That history is what builds the uptime column, and a ten-minute window missed is a window that can never be observed again.
We do not keep the correction data itself. Only the roster and the liveness.