Scientific network
Free
Science streams: raw global stations and real-time PPP orbit/clock CorrectionsLive info from a base station about how far off the satellite signals are, so your rover can cancel out the error.Full definition; not a plug-and-play RTKReal-time kinematic. A way to make GPS accurate to about an inch by getting live corrections from a nearby base station.Full definition service
Good to know: Free (registration required)
Where it works
50 statesSold nationwide. Real RTK coverage depends on station density and cell signal, so check the official map for your site.
All plans
| Plan | Price | Term |
|---|---|---|
| IGS real-time streams (BKG casters) | Free (registration required) |
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
- Not published; the public SourcetableThe list of every mount point a caster offers. Your app shows it when you connect without picking one.Full definition listed 471 mountpoints on Oct 17, 2026 (network products plus any single-station streams)
- 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 sourcetable request to igs-ip.net:2101, products.igs-ip.net:2101 answered on Oct 17, 2026 with 471 mountpoints.
- Mount types
- Single global stations (raw data) and SSR products for real-time PPP
- Correction formats
- RTCMThe common format RTK corrections are written in, so different brands can understand each other.Full definition.x observations and ephemeris; RTCM-SSR / IGS-SSR orbit and clock corrections
- Receivers that work
- Software clients such as BNC or RTKLIB; most survey rovers can't use SSR directly
Sign-up steps
- Accept the IGS terms of service
- Register at register.rtcm-ntrip.org
- Wait for the login email
- Connect with BNC or RTKLIB
- Sign-up page
- Go to sign-up →
Fine print
- 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.