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What is GNSS/GPS RTK and how does it work?

GNSS is short for Global Navigation Satellite Systems and RTK is for Real-Time Kinematic. The positioning modes we described in the article “What is the principle of GNSS positioning?” illustrate the difference between standard point positioning (SPP) and precise point positioning (PPP) as well as Differential Global Positioning System (DGPS) and RTK.

For applications that require higher accuracies, RTK is a technique that uses carrier-based ranging and provides ranges that are hundreds of times more precise than those available through point-based positioning.

GNSS RTK is a precise relative positioning technique, which achieves centimeter positioning accuracy. RTK positioning requires two set of Tersus RTK boards at minimum, which are used as the base station and the rover station respectively. Normally, the base station is set up on a fixed known point and it consistently transmits differential corrections to the rover station. The rover station receives differential corrections from the base station and calculating very precise RTK solution. The following figure is an over view of Tersus GNSS RTK system, which demonstrates how does it works. We recommend using COM2 to transmit and receiving the differential data (in RTCM format) and using COM1 for configuration and logging RTK solution.


Overview of Tersus GNSS RTK Systems


If you have further questions, feel free to contact us to info@tersus-gnss.com or visit our official website www.tersus-gnss.com

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