GPS/GNSS RTK Products

GPS/GNSS RTK solutions are used to enhance the precision of position data received from satellite-based positioning systems. RTK GNSS uses carrier-based ranging rather than code-based positioning, and relies on a single reference station to provide real-time corrections, resulting in the centimeter-level accuracy often required for applications such as surveying. To compute an RTK solution, satellite measurements are transmitted from a fixed reference station to receivers nearby. By combining their own measurements with those of the reference station, whose exact location is well known, they are able to remove common errors (ionosphere errors, satellite clock errors etc.). Once these errors have been removed, it will use the phase measurements to determine an exact position within 2–5 centimeters. RTK GNSS consists of a base station, which monitors the signals coming from the satellites, one or several rover users to which the base station sends information, and a communication channel with which the base broadcasts correction data to the users in real time.

Simply, RTK is a centimeter-level positioning technology for improving the accuracy of a standalone GNSS receiver. It is based on two GNSS receivers at least (Base Station and Rover) and their communication link (e.g. 4G/WiFi/UHF). The Base Station takes measurements from satellites in view , and then take the data along with its location as the Correction Data to the Rover. The Rover also takes measurements from satellites in view, and processes them with the Correction Data. Then the Rover can get centimeter-level positioning accuracy.