DATA CHECKED OCT 2026
All states / Tennessee

RTK corrections in Tennessee

Paid  15 options · TDOT GNSSGlobal Navigation Satellite System. The general name for GPS (USA) and the other satellite systems like GLONASS, Galileo and BeiDou.More Reference Network · Tennessee DOTDepartment of Transportation. The state agency that runs many of the free state RTK networks.More · 1 regional/private network(s)

All 15 RTK options in Tennessee

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.More CorrectionsLive info from a base station about how far off the satellite signals are, so your rover can cancel out the error.More here, free and paid, side by side: the state network, regional or private networks, and nationwide services.

OptionTypePriceNotes
TDOT GNSS Reference Network
State-run
Paid$50/mo per simultaneous access point + 2.35% card fee (older FY25 contract: $150 processing + $25/mo)Tennessee DOT
iNET Reference Station Network
Regional / private
PaidNot published (yearly, monthly and short-term plans; site licenses for multiple machines)Earl Dudley LLC / Hayes Instrument (dealer). Southeast network; dealer locations in AL, MS, TN, SC plus a Georgia coverage page. Check the map for your area
Point One Navigation Polaris
Nationwide
PaidVirtual RTK $42/mo per license (~10 cm); True RTK $125/mo per license (1-3 cm); annual discountsUS nationwide. Check the provider's coverage map for your area.
GEODNET RTK
Nationwide
Paid$40/mo or $400/yr per deviceGlobal community-built network. Check the provider's coverage map for your area.
RTKdata
Nationwide
Paid$40/mo, $400/yr, or $1,920 for 5 yrs per deviceGlobal. Check the provider's coverage map for your area.
E38 RTK Premium
Nationwide
PaidFrom $100 (shortest term; see page for durations)Reseller; coverage varies by state. Check the provider's coverage map for your area.
Emlid Corrections
Nationwide
Paid1 yr included with eligible Reach receivers; top-up $699/1 yr or $1,199/3 yr per device (via E38)Emlid receivers only. Check the provider's coverage map for your area.
u-blox PointPerfect Flex
Nationwide
PaidFrom $5.90/mo (up to 100 hrs); 30-day free trialRTK-SSR, global. Check the provider's coverage map for your area.
Swift Navigation Skylark
Nationwide
PaidFrom $69/mo (1 cm RTK) or $29/mo (sub-decimeter RTK-SSR) per ArduSimpleCheck the provider's coverage map for your area.
Leica (HxGN) SmartNet
Nationwide
PaidNot publishedPrice not published. Check the provider's coverage map for your area.
Trimble VRS Now
Nationwide
PaidNot publishedPrice not published. Check the provider's coverage map for your area.
Topcon Topnet Live
Nationwide
Paid$1,800 new US subscription (Topcon store); monthly/project terms via dealersUS 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.More. Check the provider's coverage map for your area.
Carlson SkyNet RTN
Nationwide
Paid$1,500/yr; 14-day free trialUS nationwide, single NTRIPThe standard way RTK corrections are sent over the internet. Think of it as internet radio for correction data.More Mount pointOne specific correction stream on a caster, like one channel on a radio. Each one comes from a certain station or network setup.More, 1,700+ bases. Check the provider's coverage map for your area.
RTK2GO
Nationwide
FreeFree community CasterThe internet server that hands out correction streams. Your rover logs in to it, like tuning into a radio station.More; no quality guaranteesCoverage depends on volunteer bases. Check the provider's coverage map for your area.
NOAA NGS CORS
Nationwide
FreeFree post-processing data (RINEXA standard file format for raw GPS data. Any brand of receiver or software can read it.More); not a real-time RTK serviceUse for PPKPost-processed kinematic. Like RTK, but the corrections are applied after the job using recorded data, so no live link is needed.More, not live RTK. Check the provider's coverage map for your area.
NOAA CORS (NCN)Free Post-processing onlyFree39 station(s) 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.More, not live RTK. Stations ↓

TDOT GNSS Reference Network

Paid
Operator
Tennessee DOT
Access
Paid
Price
$50/mo per simultaneous access point + 2.35% card fee (older FY25 contract: $150 processing + $25/mo)
Coverage
Tennessee

NTRIP caster

casterProvided by the operator after registration
Two TDOT documents disagree; the newer FAQ (10/2025) is used.
Sign up / request access →Network info & station mapFull network details →
✓ VerifiedChecked 2026-10-16 · operator source · Sources: [1] [2]

PPK with NOAA CORS in Tennessee

NOAANational Oceanic and Atmospheric Administration. The US agency that includes NGS and runs the CORS network.More's permanent 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.More 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 39 working station(s). Each NGSNational Geodetic Survey. The part of NOAA that runs the official US coordinate system, CORS and OPUS.More site log has the station's name and details.

HCESTN11TN12TN13TN14TN15TN16TN17TN18TN19TN1BTN21TN22TN23TN24TN25TN26TN27TN28TN29TN30TN31TN32TN33TN34TN35TN36TN37TN39TN40TN41TN42TN43TN44TN45TN46TN48TN49ZME1
Relative station positions (plotted from lat/lon, no basemap).
Station IDLat, LonNGS links
HCES36.3326, -89.1718Coordinates · Site log
TN1136.3617, -82.3928Coordinates · Site log
TN1236.2480, -83.2864Coordinates · Site log
TN1335.9436, -83.2074Coordinates · Site log
TN1436.4076, -84.0652Coordinates · Site log
TN1536.0023, -83.7706Coordinates · Site log
TN1635.9027, -84.6012Coordinates · Site log
TN1735.8134, -84.0049Coordinates · Site log
TN1836.3658, -82.1784Coordinates · Site log
TN1936.4083, -84.5281Coordinates · Site log
TN1B36.4776, -82.8117Coordinates · Site log
TN2135.0644, -85.2072Coordinates · Site log
TN2235.3905, -85.3781Coordinates · Site log
TN2335.9196, -84.9993Coordinates · Site log
TN2436.1344, -85.4994Coordinates · Site log
TN2535.3671, -86.1891Coordinates · Site log
TN2635.4431, -84.6301Coordinates · Site log
TN2736.3960, -85.3175Coordinates · Site log
TN2835.7016, -85.7454Coordinates · Site log
TN2935.2462, -84.5684Coordinates · Site log
TN3035.5516, -87.5740Coordinates · Site log
TN3136.1703, -86.8707Coordinates · Site log
TN3236.3968, -86.4055Coordinates · Site log
TN3336.5587, -87.3195Coordinates · Site log
TN3435.4263, -86.7122Coordinates · Site log
TN3536.1039, -87.6226Coordinates · Site log
TN3635.2558, -87.3260Coordinates · Site log
TN3735.6038, -87.0938Coordinates · Site log
TN3935.1914, -87.0074Coordinates · Site log
TN4035.6474, -88.4012Coordinates · Site log
TN4136.1264, -88.5127Coordinates · Site log
TN4236.1368, -89.2481Coordinates · Site log
TN4335.2286, -88.6039Coordinates · Site log
TN4435.6404, -88.9191Coordinates · Site log
TN4535.2993, -89.6596Coordinates · Site log
TN4635.2213, -88.3184Coordinates · Site log
TN4836.2961, -88.2966Coordinates · Site log
TN4935.7801, -89.5191Coordinates · Site log
ZME135.0674, -89.9554Coordinates · Site log
  • Download: daily RINEX files (a standard GPSThe US satellite navigation system. People often use "GPS" to mean all satellite positioning.More 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.More coordinate file (Oct 14, 2026).

Reliability reports

Collecting soon

No user reports yet for Tennessee networks. We only show real reports from real users, never sample data. Report collection opens soon, and here's what we'll ask:

Want to be first to report? Use the submit form or subscribe below.

Something wrong or out of date? Report it.

Price changes. New stations.
Once a month.

New state networks, price changes and reliability reports. One email a month, no spam.