Emlid Caster
Free
Free relay for your own base
Free
Not a network: sends YOUR base's CorrectionsLive info from a base station about how far off the satellite signals are, so your rover can cancel out the error.Full definition to your 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 over the internet
Good to know: Free (relay for your own Base stationA GNSS receiver sitting still on a known spot. It figures out how wrong the satellite signals are right now and shares that as corrections.Full definition)
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 |
|---|---|---|
| Emlid Caster | Free |
- What's included
- Up to 5 bases and 10 rovers at the same time
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 1113 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 rover (cell data or a phone hotspot). General rule, not an operator statement.
Connection settings
NTRIP caster
Confirmed live: a public sourcetable request to caster.emlid.com:2101 answered on Oct 17, 2026 with 1113 mountpoints.
- Mount types
- Your own base (single base)
- Receivers that work
- Any NTRIP base/rover; made for Emlid Reach
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
- Last checked
- Oct 17, 2026
States covered50
Not listed by the operator: free trial, discounts, a coverage map, correction formats 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.