When accuracy matters, standard GPS simply isn’t enough.
Whether you’re staking out a construction project, guiding a drill rig in a mine, or operating a machine control system on a civil site, you need positioning that is accurate to within a few centimetres—not several metres.
That’s where RTK (Real-Time Kinematic) GPS comes in.
RTK technology uses correction data from a known reference source to dramatically improve the accuracy of GNSS positioning, making it the gold standard for surveying, construction, mining, and machine guidance.
What Does RTK Stand For?
RTK stands for Real-Time Kinematic, a positioning technique that uses a fixed reference station and a mobile receiver (rover) to calculate highly accurate positions in real time.
Unlike standard GPS, which can have errors of several metres, RTK can routinely achieve 10–20 mm horizontal accuracy under ideal conditions.
How Does RTK GPS Work?
RTK relies on three key components:
1. GNSS Satellites
Multiple satellite constellations continuously broadcast positioning signals, including:
- GPS
- GLONASS
- Galileo
- BeiDou
- QZSS
Modern receivers use signals from several constellations simultaneously, improving reliability and accuracy.
2. The Base Station
A base station is installed at a precisely surveyed location.
Because it knows its exact coordinates, it can calculate positioning errors affecting satellite signals and broadcast correction data to nearby rovers.
If you don’t have your own base station, correction data can instead be received through services like SmartNet.
👉 Learn more about SmartNet:
https://rededgeresources.com.au/smartnet-subscription/
3. The Rover
The rover receives:
- Satellite observations directly from space
- Correction messages from the base station or RTK network
By combining these data sources, it removes common positioning errors and calculates a highly accurate position in real time.
At Red Edge Resources, we supply professional Stonex GNSS rovers and base stations built for Australian surveying, mining, and construction projects.
👉 View our Stonex GNSS range:
https://rededgeresources.com.au/stonex-gps-gnss-survey-equipment/
Why Is Standard GPS Less Accurate?
Every GPS measurement is affected by factors such as:
- Atmospheric interference
- Satellite clock errors
- Orbital inaccuracies
- Multipath reflections
- Receiver noise
A standard GPS device may only achieve 3–10 metre accuracy, while RTK dramatically improves precision using real-time corrections.
RTK vs Standard GPS
| Feature | Standard GPS | RTK GPS |
|---|---|---|
| Typical Accuracy | 3–10 metres | 10–20 mm |
| Requires Corrections | No | Yes |
| Suitable for Surveying | No | Yes |
| Suitable for Machine Control | No | Yes |
| Suitable for Mining | No | Yes |
| Real-Time Operation | Yes | Yes |
How Are RTK Corrections Delivered?
Local Base Station
A dedicated GNSS base station broadcasts corrections via UHF radio or IP communications.
This method is commonly used on mine sites and major construction projects where consistent local coverage is required.
NTRIP Network
Internet-based RTK services transmit corrections over mobile data networks, eliminating the need for users to own and maintain a permanent base station.
Satellite-Based Corrections
Services such as Hemisphere Atlas deliver high-accuracy corrections directly from satellites, providing excellent performance over wide geographic areas.
👉 Learn more about Hemisphere Atlas:
https://rededgeresources.com.au/hemisphere-atlas-subscription/
RTK for Machine Control
Modern machine control systems rely heavily on RTK positioning to achieve precise grading, excavation, piling, and drilling.
Benefits include:
- Reduced rework
- Improved accuracy
- Faster project completion
- Lower surveying costs
- Greater productivity
👉 Explore our machine control solutions:
https://rededgeresources.com.au/machine-control/
RTK in Mining
Mining companies use RTK technology for:
- Blast hole drilling
- Drill guidance
- Grade control
- Open-cut surveys
- Stockpile measurement
- Site infrastructure
- Fleet positioning
Reliable centimetre-level positioning helps improve production while reducing costly errors.
What Equipment Do You Need?
A typical RTK setup includes:
- A GNSS rover
- A GNSS base station or correction subscription
- Radio or internet communications
- Survey or machine control software
Modern Stonex GNSS receivers support multiple satellite constellations and integrate seamlessly with RTK correction services, making them an excellent choice for Australian conditions.
👉 Browse our Stonex GNSS equipment:
https://rededgeresources.com.au/stonex-gps-gnss-survey-equipment/
RTK vs PPP
While RTK relies on nearby correction sources and provides immediate centimetre-level positioning, Precise Point Positioning (PPP) uses global correction models delivered via satellite or internet.
Solutions like Hemisphere Atlas provide high accuracy over large regions without requiring a local base station, making them ideal for many remote applications.
Why Choose Red Edge Resources?
Red Edge Resources supplies and supports advanced positioning technology for surveying, mining, civil construction, and machine control across Australia.
Our solutions include:
- Stonex GNSS rovers and base stations
- SmartNet RTK subscriptions
- Hemisphere Atlas subscriptions
- Machine control systems
- Mining drill guidance technology
Whether you’re setting up your first RTK system or upgrading an existing fleet, our experienced team can help you select the right solution for your application.