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Knowledge Base
Guides, tutorials, and reference material for RTK and GNSS users.
Getting Started
What is RTK?
What equipment do I need?
How accurate is RTK?
Do I need a base station of my own?
What is the difference between RTK and PPK?
Can I use RTK with a phone or tablet?
Why does my receiver show 'float' instead of 'fixed'?
NTRIP & Corrections
What is NTRIP?
What's a mountpoint?
What's a VRS?
Which RTCM messages do I need?
How much mobile data does NTRIP use?
What happens if the correction link drops?
What port and credentials does NTRIP use?
Network RTK
Network RTK vs single-base?
How far can I work from a base?
What is MAC (Master-Auxiliary Concept)?
Do I need to send my position to the network?
Accuracy & Coordinates
Why are my RTK coordinates offset from my map?
What is the difference between ellipsoidal and orthometric height?
How can I check my accuracy in the field?
Choosing a Service
Are free RTK networks good enough for professional work?
Should I try before I buy?
What is PPP-RTK and when should I use it?