NOAA NGS CORS
Free
Post-processing data
Free
Use for PPKPost-processed kinematic. Like RTK, but the corrections are applied after the job using recorded data, so no live link is needed.Full definition, not live RTKReal-time kinematic. A way to make GPS accurate to about an inch by getting live corrections from a nearby base station.Full definition
Good to know: Free post-processing data (RINEXA standard file format for raw GPS data. Any brand of receiver or software can read it.Full definition); not a real-time RTK service
All plans
| Plan | Price | Term |
|---|---|---|
| Free | $0 |
Coverage
- Where it works
- Post-processing data, not live RTK.
- Official coverage map
- Open map →
- Needs cell signal?
- Not needed (download files after the job)
- Network
- Post-processing RINEX data from the NOAA CORS Network (NCNThe NOAA CORS Network. NOAA's nationwide group of permanent base stations, with data free to download.Full definition); not real-time
Connection settings
NTRIP caster
Sign-up steps
No step-by-step guide is published. Start at the sign-up page.
Fine print
- Last checked
- Oct 17, 2026
States covered
No state-by-state list published.
Not listed by the operator: free trial, discounts, what's included, station count 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.