FAQ
Common questions about RTKdata.com: accuracy expectations, valid mountpoints, free trial auto-end, subscriptions, geoid vs ellipsoidal heights, and billing.
FAQ - RTK, NTRIP, Coverage, Billing
This page consolidates the most common questions from customers and our support log, plus key information from the RTKdata.com website.
Getting started
How do I connect quickly?
Follow the Quick Start and then double-check the Network (Hosts/IPs & Mountpoints) page. In short: use the regional hostname (NA/EU/AUS), Port 2101, mountpoint AUTO (ALL CAPS), and make sure your app or device sends NMEA GGA to the caster.
What is GNSS RTK in simple terms? RTK is a real-time correction method that uses fixed base stations and streams corrections to your rover over the internet (NTRIP), delivering centimeter-level accuracy in open sky.
Connection & settings
Which server (host) should I use? Use the hostname closest to you; if your device only accepts numbers or DNS is blocked, use the IP fallback. See Network for the canonical list:
North America:
rtk.rtkdata.com(IP13.56.117.10)Europe:
eu.rtkdata.com(IP3.73.41.96)Australia:
aus.rtkdata.com(IP54.206.56.130)Port:
2101
Which mountpoint should I choose?
Use AUTO unless your workflow explicitly needs a global frame. AUTO applies the regional frame automatically (e.g., NAD83(2011) in the US; ETRS89(ETRF2000) in Europe; GDA2020 in Australia). For global frames choose AUTO_WGS84 or AUTO_ITRF2020.
Do I need to send GGA? Yes. Most casters won’t localize you without NMEA GGA. Enable “Send GGA to caster” in your app/device (or, for DJI Pilot 2, start transmitting after the aircraft has a GNSS fix). See NTRIP & GGA essentials.
What correction format should my rover accept? Your rover should consume RTCM 3.x over NTRIP. Most modern GNSS receivers and apps support this.
Accuracy, frames & heights
What accuracy should I expect? In open sky, typical results are ~1–2 cm horizontal and 2–3 cm vertical. Sky view, antenna quality, and baseline still matter—verify on your site.
What’s the difference between AUTO, AUTO_WGS84 and AUTO_ITRF2020?
AUTOapplies the regional frame automatically (NAD83/ETRS89/GDA2020/NZGD2000…).AUTO_WGS84uses global WGS84 (G2139).AUTO_ITRF2020uses ITRF2020 (epoch 2015.0). Pick the one that matches your downstream control/processing.
Why do my elevations look “off”? RTK broadcasts ellipsoidal heights in the chosen frame. Apply a geoid model (e.g., EGM2008, GEOID18, AUSGeoid2020) in GIS/photogrammetry to get orthometric heights (mean sea level).
Coverage & performance
Is coverage limited to North America, Europe, and Australia? No—those are login endpoints (casters). Coverage is global: the network assigns a nearby base using your GGA position, regardless of which endpoint you used to log in. Major density regions include North America, Europe, Australia, New Zealand, and South Asia. Always validate on site with a quick outdoor FIX test.
When does RTK perform best? In open environments with clear satellite view and minimal multipath (trees, buildings, metal).
How does RTK compare to PPP/PPP-RTK, DGPS and INS?
PPP/PPP-RTK: global but typically slower convergence; decimeter-level typical.
DGPS/DGNSS: sub-meter; simpler but less precise.
INS: bridges GNSS outages; accuracy drifts over time. RTK is the go-to when you need immediate, centimeter-grade positions in open sky.
Devices & compatibility
What equipment is compatible? Any rover/app that supports NTRIP and RTCM 3.x. This includes most modern GNSS receivers and popular field apps. See the Integration Hub for step-by-step guides.
Do I need my own RTK base station? No—network RTK removes the need for a personal base. For specific cases, a local base can be used; contact us if required.
How many devices can I use per license? Standard plans provide one data stream per license. For multiple streams or larger fleets, ask for a custom plan.
Accounts, plans & billing
Do you offer a free trial? Yes -30 days, and it auto-ends (no cancellation needed). Start here: Free Trial.
What are the prices? See the Pricing page for current monthly/annual plans and volume options.
Can I cancel and resume later? Yes. Manage your subscription in your account; trials end automatically. For volume or enterprise quotes, book a call.
Troubleshooting & support
I’m connected but getting no corrections.
Almost always no GGA. Enable “Send GGA to caster” (or, for DJI Pilot 2, start transmitting after the aircraft has a GNSS fix). Then confirm mountpoint = AUTO (ALL CAPS). See Troubleshooting.
Which port should my firewall allow? TCP 2101 for NTRIP/NTRIPv2. If DNS is blocked, use the IP fallback listed on Network.
How do I contact support? Email [email protected]. Include:
Username, region host, and mountpoint
App/device model + screenshots of NTRIP settings
A GGA line from your session, plus UTC time window
Legal & company
Where can I find Imprint, Privacy and Terms? See Imprint, Privacy Policy, and Terms of Service.
Related - Network & Mountpoints · Troubleshooting · Start Free Trial
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