Commercial network
From $69/mo
Good to know: From $69/mo (1 cm RTKReal-time kinematic. A way to make GPS accurate to about an inch by getting live corrections from a nearby base station.Full definition) or $29/mo (sub-decimeter RTK-SSR) per ArduSimple
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 |
|---|---|---|
| Skylark Nx RTK | $69/mo or $699/yr | Monthly or annual; volume discounts |
- Free trial
- 14 days
- Contract / terms
- Monthly or annual subscription; volume pricing by contact
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 13 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.
- Network
- Cloud network RTK (VRSVirtual reference station. The network blends nearby stations to create a pretend base right next to you, which keeps the baseline short.Full definition) with atmospheric modeling
Connection settings
NTRIP caster
hostna.l1l2 / na.l1l5 / na.all-freq .skylark.swiftnav.com
PortA number that tells your device which "door" on the caster server to use. For NTRIP it's often 2101.Full definition2101 (2102 TLS, 2103 mTLS)
mountsDX-MSM1, MSM4, MSM5, NXRTK-MSM5, NXRTK-NAD83-MSM5, NXRTK-RTCM31, NXRTK-WGS84-G1674-MSM5, OSR, SBL-MSM1, SBL-MSM5, SSR, SSR-integrity, SSR-integrity-AES-CMAC
Confirmed live: a public sourcetable request to na.l1l5.skylark.swiftnav.com:2101 answered on Oct 17, 2026 with 13 mountpoints.
- Correction formats
- RTCMThe common format RTK corrections are written in, so different brands can understand each other.Full definition MSM5
- 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
- ITRFInternational Terrestrial Reference Frame. A worldwide datum. In the US it's about a meter different from NAD 83.Full definition current epoch, WGS 84The worldwide datum GPS uses by default. It's very close to ITRF.Full definition(G1674), or NAD 83(2011)The official US datum for horizontal position right now. Most state networks give coordinates in it.Full definition epoch 2010 by 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
- Receivers that work
- Hardware agnostic; receiver lookup on Swift site
Sign-up steps
- Sign up on the Skylark portal for monthly or annual
- Activate licenses in the Skylark User Portal
Fine print
- Last checked
- Oct 17, 2026
States covered50
AlaskaFreeAlabamaFreeArkansasFreeArizonaFreeCaliforniaPaidColoradoFreeConnecticutFreeDelawarePaidFloridaFreeGeorgiaPaidHawaiiPaidIowaFreeIdahoPaidIllinoisFreeIndianaFreeKansasPaidKentuckyFreeLouisianaPaidMassachusettsFreeMarylandPaidMaineFreeMichiganFreeMinnesotaFreeMissouriFreeMississippiFreeMontanaPaidNorth CarolinaPaidNorth DakotaPaidNebraskaPaidNew HampshirePaidNew JerseyPaidNew MexicoPaidNevadaPaidNew YorkFreeOhioFreeOklahomaPaidOregonFreePennsylvaniaPaidRhode IslandFreeSouth CarolinaPaidSouth DakotaPaidTennesseePaidTexasPaidUtahPaidVirginiaPaidVermontFreeWashingtonPaidWisconsinPaidWest VirginiaFreeWyomingPaid
Not listed by the operator: discounts, what's included, a coverage map, mountpoints 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.