Where it works
1 stateState-run network for Mississippi.
All plans
| Plan | Price | Term |
|---|---|---|
| Public access | Free |
- Contract / terms
- Free of charge
Coverage
- Where it works
- State-run network for Mississippi.
- 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 14 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
hostRTNReal-time network. A group of base stations spread across an area that work together to send RTK corrections.Full definition.USM.EDU
PortA number that tells your device which "door" on the caster server to use. For NTRIP it's often 2101.Full definition2101
mountsSB_RTCM31, CMRPLUS_VRS, RTCM23_VRS, RTCM31_VRS, CMRX_VRS, SB_RTCM23, NSB_GPGL_RTCM31_NAD83, NSB_GPGL_RTCM23_NAD83, NSB_GNSS_RTCM34_NAD83, VRS_GNSS_CMRx_NAD83, VRS_GNSS_RTCM34_NAD83, VRS_GPGL_CMRp_NAD83, VRS_GPGL_RTCM31_NAD83, VRS_GPGL_RTCM23_NAD83
Confirmed live: a public sourcetable request to RTN.USM.EDU:2101 answered on Oct 17, 2026 with 14 mountpoints.
- Mount types
- VRSVirtual reference station. The network blends nearby stations to create a pretend base right next to you, which keeps the baseline short.Full definition (network) and Nearest Single Base
- Correction formats
- RTCMThe common format RTK corrections are written in, so different brands can understand each other.Full definition 2.3, RTCM 3.1, RTCM 3.4 MSMMultiple Signal Messages. A newer kind of RTCM 3 message that carries all satellite systems and signals.Full definition, CMRxTrimble's own compact correction format. Some networks offer it for Trimble gear and machine control.Full definition, CMRx
- Satellites (ConstellationOne family of navigation satellites, like GPS, GLONASS, Galileo or BeiDou. More constellations means more satellites to use.Full definition)
- GPSThe US satellite navigation system. People often use "GPS" to mean all satellite positioning.Full definition, GLONASS, Galileo, BeiDou on VRS_GNSS mounts
- 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
- NAD 83(2011)The official US datum for horizontal position right now. Most state networks give coordinates in it.Full definition epoch 2010.00
- 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?
- Yes for VRS / network / nearest-base mountpoints (your rover must send its position as an NMEAA common text format GPS receivers use to report position and status. GGA is one NMEA message.Full definition GGA message). General rule based on the mount types.
Sign-up steps
- Register at rtn.usm.edu/RegisterAccount.aspx (one ID per email)
- Use the system-generated login and password
- Connect to RTN.USM.EDU port 2101
- Sign-up page
- Go to sign-up →
Fine print
- Last checked
- Oct 17, 2026
52 CORSContinuously Operating Reference Station. A permanent GPS receiver that records satellite data all day, every day.Full definition. Accounts are processed by hand (up to 10 business days). rtn.usm.edu timed out from our fetcher.
States covered1
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.