Nationwide / scientific
Free
Science-grade stations (NOTA); pick a station near you
Good to know: Free for non-commercial use; commercial license required
Where it works
50 statesSold nationwide. Real RTKReal-time kinematic. A way to make GPS accurate to about an inch by getting live corrections from a nearby base station.Full definition coverage depends on station density and cell signal, so check the official map for your site.
All plans
| Plan | Price | Term |
|---|---|---|
| Non-commercial license | Free | 1 year; renew any time; unlimited seats; scientific, educational or humanitarian use |
| Commercial license | $1,000 per seat per year | A seat = one RTCMThe common format RTK corrections are written in, so different brands can understand each other.Full definition stream (BINEX streams need no seat); prorated seat changes; direct billing from 5 seats |
Coverage
- Where it works
- Sold nationwide. Real RTK coverage depends on station density and cell signal, so check the official map for your site.
- Stations
- 1,277 real-time mountpoints listed (NOTA network)
- Needs cell signal?
- Yes: NTRIPThe standard way RTK corrections are sent over the internet. Think of it as internet radio for correction data.Full definition needs internet at the RoverThe receiver that moves around the job, like a survey pole or a drone. It uses the base's corrections to find its exact spot.Full definition (cell data or a phone hotspot). General rule, not an operator statement.
Connection settings
NTRIP caster
Confirmed live: a public SourcetableThe list of every mount point a caster offers. Your app shows it when you connect without picking one.Full definition request to ntrip.earthscope.org:2101 answered on Oct 17, 2026 with 1122 mountpoints.
- Mount types
- Single base (you pick a station)
- Correction formats
- RTCM 3.3 MSM7, 1 Hz; BINEX
- Datum / EpochOne moment of GPS measurement. A receiver logging at 1 Hz records one epoch every second.Full definition / GeoidA lumpy, imaginary "sea level" surface around the whole Earth. Elevations are measured from it.Full definition
- Not published per stream (check station info)
- Must send GGAA short message your rover sends with its rough location. VRS and nearest-station streams need it to know where you are.Full definition position?
- No (you choose the station)
Sign-up steps
No step-by-step guide is published. Start at the sign-up page.
- Sign-up page
- Go to sign-up →
Fine print
- Support
- [email protected]
- Last checked
- Oct 17, 2026
States covered50
Not listed by the operator: free trial, discounts, what's included, a coverage map and a few other details. Ask them before you sign up if these matter to you.
No user reliability reports yet. Used it in the field? Tell us how it went.