NGF NOTA real-time streams
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Free
✓ Listing confirmed by operator, Nov 2, 2026 How we check
Nationwide / scientific
Free
Run by the National Geophysical Facility (NGF). 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 RTKRTKReal-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 RTCMRTCMThe 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)
- Official coverage map
- Open map →
- Needs cell signal?
- Yes: NTRIPNTRIPThe standard way RTK corrections are sent over the internet. Think of it as internet radio for correction data.Full definition needs internet at the roverRoverThe 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.
- Network
- NOTA (Network of the Americas) real-time streams are run by the National Geophysical Facility (NGF). Use the NGF station map to find a station near you, and ntrip.earthscope.org to check stream status.
Connection settings
NTRIP caster
Confirmed live: a public sourcetableSourcetableThe 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 / epochEpochOne moment of GPS measurement. A receiver logging at 1 Hz records one epoch every second.Full definition / geoidGeoidA 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 GGAGGAA 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
- Sign up on the operator sign-up page.
- Confirm your email if asked, then log in and copy your casterCasterThe internet server that hands out correction streams. Your rover logs in to it, like tuning into a radio station.Full definition address, port, mount pointMount pointOne specific correction stream on a caster, like one channel on a radio. Each one comes from a certain station or network setup.Full definition, user name and password.
- In your rover's NTRIP client, enter caster ntrip.earthscope.org, port 2101 (RTCM); 2105 (BINEX), and the mount point you were given (or the one closest to you).
- Go out under open sky and wait for the status to show RTK FIXFixThe best RTK status. The receiver has finished its math and your position is good to about an inch.Full definition before you start measuring.
- Sign-up page
- Go to sign-up →
Fine print
- System status page
- Status →
- Support
- [email protected]
- Last checked
- Nov 2, 2026
States covered50
Not listed by the operator: free trial, discounts, what's included, which satellites and a few other details. Ask them before you sign up if these matter to you.
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