All states / Missouri

RTK in Missouri

24 ways to get CorrectionsLive info from a base station about how far off the satellite signals are, so your rover can cancel out the error.Full definition, from free state networks to nationwide services.

Best option for most people in Missouri

MoDOT CORS RTN (MO)

Free

A free network for everyone in Missouri. You register once, then connect your own receiver.

See setup and sign-upCompare all 24 options

Good to know: Registration is required.

Other options

Nationwide services

Show all 24 options

Compare all 24 RTK options in Missouri

Every way to get RTKReal-time kinematic. A way to make GPS accurate to about an inch by getting live corrections from a nearby base station.Full definition corrections here, side by side: the state network, regional or private networks, and nationwide services. Tap a name for the full details page. Want to know about one exact spot? Check an address or ZIP →

OptionAccessPriceFree trialCasterMount typesNotes
MoDOT CORS RTN
State-run network
FreeFree—rtk3.modot.mo.gov:2101VRSVirtual reference station. The network blends nearby stations to create a pretend base right next to you, which keeps the baseline short.Full definitionMissouri DOTDepartment of Transportation. The state agency that runs many of the free state RTK networks.Full definition
Point One Navigation Polaris
Commercial network
PaidVirtual RTK $42/mo per license (~10 cm); True RTK $125/mo per license (1-3 cm); annual discounts14 days, no credit card required; includes Virtual RTK or…polaris.pointonenav.com:2101—US nationwide. Check the provider's coverage map for your area.
GEODNET RTK
Community network
Paid$40/mo or $400/yr per deviceFree RTK trial offered (link on store page)rtk.geodnet.com:2101Nearest single baseGlobal community-built network. Check the provider's coverage map for your area.
RTKdata
Commercial network
Paid$40/mo, $400/yr, or $1,920 for 5 yrs per device30 days, full service, no credit card, no auto-renewrtk.rtkdata.com:2101Nearest single baseGlobal. Check the provider's coverage map for your area.
E38 RTK Premium
Reseller
PaidFrom $100 (shortest term; see page for durations)—rtkpremium.xyz:2101—Reseller; coverage varies by state. Check the provider's coverage map for your area.
Emlid Corrections
Commercial network
Paid1 yr included with eligible Reach receivers; top-up $699/1 yr or $1,199/3 yr per device (via E38)—Not needed (built in)—Emlid receivers only. Check the provider's coverage map for your area.
u-blox PointPerfect Flex
Commercial network
PaidFrom $5.90/mo (up to 100 hrs); 30-day free trial30-day free trial (u-blox and non-u-blox receivers)ppntrip.services.u-blox.com:2101—RTK-SSR, global. Check the provider's coverage map for your area.
Swift Navigation Skylark
Commercial network
PaidFrom $69/mo (1 cm RTK) or $29/mo (sub-decimeter RTK-SSR) per ArduSimple14 daysna.l1l2:2101—Check the provider's coverage map for your area.
Leica (HxGN) SmartNet
Commercial network
PaidNot published—<state:9301iMAX network, nearest single basePrice not published. Check the provider's coverage map for your area.
Trimble VRS Now
Commercial network
PaidNot published—www.vrsnow.us:2101—Price not published. Check the provider's coverage map for your area.
Topcon Topnet Live
Commercial network
Paid$1,800 new US subscription (Topcon store); monthly/project terms via dealers—After signup—US network, 200 stations added Jan 2025; works with any network 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. Check the provider's coverage map for your area.
Carlson SkyNet RTN
Commercial network
Paid$1,500/yr; 14-day free trial14 daysAfter signup—US nationwide, single NTRIPThe standard way RTK corrections are sent over the internet. Think of it as internet radio for correction data.Full definition Mount 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, 1,700+ bases. Check the provider's coverage map for your area.
RTK2GO
Free community CasterThe internet server that hands out correction streams. Your rover logs in to it, like tuning into a radio station.Full definition
FreeFree community caster; no quality guarantees—rtk2go.com:2101—Coverage depends on volunteer bases. Check the provider's coverage map for your area.
NOAA NGS CORS
Post-processing data
FreeFree 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—None (data download)—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 RTK. Check the provider's coverage map for your area.
Onocoy
Nationwide / community
Paid$20 per 30 days + $0.15/hr used—clients.onocoy.com:2101Nearest single baseCommunity-built global network; pay per hour. Check the provider's coverage map for your area.
EarthScope NOTA real-time streams
Nationwide / scientific
FreeFree for non-commercial use; commercial license required—ntrip.earthscope.org:2101Single base (you pick a station)Science-grade stations (NOTA); pick a station near you. Check the provider's coverage map for your area.
Emlid Caster
Free relay for your own base
FreeFree (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)—caster.emlid.com:2101Your own base (single base)Not a network: sends YOUR base's corrections to your rover over the internet. Check the provider's coverage map for your area.
Trimble CenterPoint RTX
Nationwide / satellite PPP
Paid$1,150/yr (US dealer listing)—Not needed (built in)PPP (RTX), delivered by L-band satellite or internetSatellite PPP; works without cell signal; Trimble receivers. Check the provider's coverage map for your area.
Trimble Catalyst
Nationwide / subscription GNSSGlobal Navigation Satellite System. The general name for GPS (USA) and the other satellite systems like GLONASS, Galileo and BeiDou.Full definition
Paid$455/mo per user (dealer listing)—Not needed (built in)—Subscription GNSS for phones/tablets with the DA2 antenna. Check the provider's coverage map for your area.
NovAtel TerraStar
Nationwide / satellite PPP
PaidNot published (dealer quote)—sid-output.com:2101PPP corrections by L-band satellite or internetSatellite PPP (also sold as Leica SmartLink and by Ag Leader). Check the provider's coverage map for your area.
John Deere RTK
Ag network (dealer)
PaidNot published (dealer); forum reports ~$1,250-$1,500/machine/yr—Not NTRIP (built in)—Ag: StarFire receivers via Deere dealers. Check the provider's coverage map for your area.
Case IH AFS RTK+
Ag network (dealer)
Paid$838.10/yr (dealer listing)—After signup—Ag: cellular RTK for Case IH AFS receivers. Check the provider's coverage map for your area.
New Holland PLM RTK+
Ag network (dealer)
PaidNot published (dealer subscription)—After signup—Ag: cellular RTK to a tractor modem, 1.5 cm. Check the provider's coverage map for your area.
IGS real-time streams (IGS-IP / BKG)
Scientific network
FreeFree (registration required)—igs-ip.net:2101Single global stations (raw data) and SSR products for real-time PPPScience streams: raw global stations and real-time PPP orbit/clock corrections; not a plug-and-play RTK service. Check the provider's coverage map for your area.
NOAA CORS (NCN)Free Post-processing onlyFree—No caster (download files)Post-processing (RINEX)66 stations in state. RINEX for PPK and OPUSOnline Positioning User Service. A free NOAA website: upload a GPS file and it emails back the precise position of that spot.Full definition, not live RTK. Stations ↓—

A dash means the operator doesn't publish it. Listings checked Oct 17, 2026.

State network details

MoDOT CORS RTN

Free
Operator
Missouri DOT
Access
Free
Price
Free
Coverage
Missouri

NTRIP caster

casterProvided by the operator after registration
Operator FAQ: 'No, it is a free network.'
Sign up / request access →Network info & station mapFull network details →
VerifiedChecked Oct 16, 2026 · operator source · Sources: [1] [2]
Post-process with free NOAANational Oceanic and Atmospheric Administration. The US agency that includes NGS and runs the CORS network.Full definition base stations

PPK with NOAA CORS in Missouri

NOAA's permanent base stations record satellite data all day and post it free. You can download those files and use them after a job to correct your drone or rover data (PPK), or to pin down your own base with OPUS. This is not live RTK. This state has 66 working stations. Each NGSNational Geodetic Survey. The part of NOAA that runs the official US coordinate system, CORS and OPUS.Full definition site log has the station's name and details.

St. LouisKansas CitySt. CharlesSt. JosephJoplinJoplinMOA2MOALMOATMOBEMOBFMOBOMOBRMOBTMOBUMOBWMOCAMOCDMOCEMOCHMOCLMOCNMOCOMOCRMOCSMODPMODRMODXMOEBMOEDMOELMOFEMOGFMOHLMOHSMOHTMOHVMOIPMOJCMOJKMOKEMOKVMOMCMOMFMOMGMOMLMOMOMOMVMONCMONEMONFMOOFMOPLMOPNMORMMOSDMOSEMOSFMOSGMOSHMOSIMOSLMOSRMOSTMOSVMOTKMOVBMOVEMOWBMOWRMOWSMOWW
Tap or hover a dot: — NOAA CORSContinuously Operating Reference Station. A permanent GPS receiver that records satellite data all day, every day.Full definition station   City
66 operational NOAA CORS stations plotted at their published positions (NGS ITRF2020 coordinates). State outlines: US Census Bureau via us-atlas. Cities: Natural Earth (public domain).
List of stations66
Station IDLat, LonNGS links
MOA236.6843, -94.4384Coordinates · Site log
MOAL40.2558, -94.2997Coordinates · Site log
MOAT36.6894, -91.3768Coordinates · Site log
MOBE37.4554, -91.2158Coordinates · Site log
MOBF38.7643, -90.2466Coordinates · Site log
MOBO38.9313, -92.7788Coordinates · Site log
MOBR36.7098, -93.2232Coordinates · Site log
MOBT38.2575, -94.3934Coordinates · Site log
MOBU37.6597, -93.1029Coordinates · Site log
MOBW37.7049, -90.7441Coordinates · Site log
MOCA37.1775, -94.3576Coordinates · Site log
MOCD38.0359, -92.7731Coordinates · Site log
MOCE39.7692, -93.5392Coordinates · Site log
MOCH36.9181, -89.3188Coordinates · Site log
MOCL38.3888, -93.7559Coordinates · Site log
MOCN40.1435, -91.5438Coordinates · Site log
MOCO38.9922, -92.2847Coordinates · Site log
MOCR39.7468, -94.2312Coordinates · Site log
MOCS36.6467, -93.9057Coordinates · Site log
MODP36.6451, -90.7980Coordinates · Site log
MODR38.4626, -91.4653Coordinates · Site log
MODX36.8069, -89.9786Coordinates · Site log
MOEB39.1789, -90.7877Coordinates · Site log
MOED40.1866, -92.1751Coordinates · Site log
MOEL38.3471, -92.5954Coordinates · Site log
MOFE38.1948, -90.3892Coordinates · Site log
MOGF37.4293, -93.8461Coordinates · Site log
MOHL39.6954, -91.4014Coordinates · Site log
MOHS37.3382, -91.9399Coordinates · Site log
MOHT36.2439, -89.7283Coordinates · Site log
MOHV38.6092, -94.3203Coordinates · Site log
MOIP39.1218, -94.3875Coordinates · Site log
MOJC38.5798, -92.2947Coordinates · Site log
MOJK37.4124, -89.6501Coordinates · Site log
MOKE36.2214, -90.0735Coordinates · Site log
MOKV39.4322, -92.9319Coordinates · Site log
MOMC39.1618, -91.8294Coordinates · Site log
MOMF37.3460, -92.9505Coordinates · Site log
MOMG37.1310, -92.3111Coordinates · Site log
MOML40.2105, -93.1161Coordinates · Site log
MOMO36.9168, -93.9831Coordinates · Site log
MOMV40.3582, -94.8467Coordinates · Site log
MONC39.7587, -92.7428Coordinates · Site log
MONE37.8658, -94.3496Coordinates · Site log
MONF37.5721, -92.3426Coordinates · Site log
MOOF38.7539, -90.6958Coordinates · Site log
MOPL39.3845, -94.7834Coordinates · Site log
MOPN40.4174, -93.5775Coordinates · Site log
MORM39.2775, -93.9262Coordinates · Site log
MOSD38.6922, -93.2511Coordinates · Site log
MOSE37.1558, -92.7540Coordinates · Site log
MOSF37.2418, -93.2299Coordinates · Site log
MOSG37.9375, -90.1358Coordinates · Site log
MOSH39.6985, -92.0527Coordinates · Site log
MOSI38.5623, -90.4614Coordinates · Site log
MOSL37.1773, -90.4646Coordinates · Site log
MOSR37.8207, -92.1543Coordinates · Site log
MOST37.9704, -91.3426Coordinates · Site log
MOSV39.9542, -94.8476Coordinates · Site log
MOTK40.4373, -95.3512Coordinates · Site log
MOVB36.9601, -91.0605Coordinates · Site log
MOVE38.1914, -91.9487Coordinates · Site log
MOWB38.8145, -93.7413Coordinates · Site log
MOWR38.8147, -91.1614Coordinates · Site log
MOWS36.9699, -91.9199Coordinates · Site log
MOWW38.2534, -93.3618Coordinates · Site log
  • Download: daily RINEX files (a standard GPSThe US satellite navigation system. People often use "GPS" to mean all satellite positioning.Full definition file type) at geodesy.noaa.gov/corsdata/rinex/YYYY/DDD/ssss/ or the AWS mirror. Custom time spans are available from UFCORS.
  • How often it records: after 30 days, NGS thins daily files to one reading every 30 seconds. Full-rate data is available from NOAA NCEI CLASS.
  • Set your own base: OPUS. See our OPUS how-to.
PPK how-to →OPUS how-to
Source: NGS CORS data access · station list from NGS ITRFInternational Terrestrial Reference Frame. A worldwide datum. In the US it's about a meter different from NAD 83.Full definition coordinate file (Oct 14, 2026).

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Quick answers

Is there a free RTK network in Missouri?

Yes. MoDOT CORS RTN is listed as free. Check the operator's terms before you sign up.

How many RTK correction options are there in Missouri?

FixFinder lists 24: 1 state-run network, 0 regional or private networks, and 23 nationwide services.

How much does MoDOT CORS RTN cost?

Free

What is the NTRIP caster for MoDOT CORS RTN?

Host rtk3.modot.mo.gov, port 2101. You get your username, password and mount point when you register.

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Price changes and new stations, once a month.

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