RTK stands for Real-time Kinematics, which is another technology to improve the precision of GPS positioning measurement. However, it is one of the most difficult to understand and implement technologies.
Traditional GPS measurement methods such as static, rapid static, and kinematic require post-processing to achieve centimeter-level accuracy. However, RTK mobile data terminal for sale can achieve centimeter-level positioning accuracy in real-time in the field. It uses Carrier Phase Dynamic Real-time Differential method, which is a major milestone in GPS applications. Its introduction brings new horizons for engineering layout, terrain mapping, and various control measurements, greatly improving infield work efficiency.
High-precision GPS fleet management & vehicle tracking requires the use of Carrier Phase measurements. RTK mobile data terminal spositioning technology is based on Carrier Phase observation values and is a real-time dynamic positioning technology that can provide three-dimensional positioning results of the measurement station in a specified coordinate system in real-time with centimeter-level accuracy. In RTK operation mode, the base station sends its observations and station coordinates to the rover via a data link. The rover not only receives data from the base station via the data link but also collects GPS observation data and performs real-time processing of differential observation values in the system, providing centimeter-level positioning results in less than a second.
The rover can be in a stationary or moving state, and can be initialized at a fixed point before entering dynamic operation, or can start up directly in dynamic conditions and complete search and resolution of cycle ambiguities in dynamic environments. After fixing the integer ambiguity at the end of the cycle, real-time processing can be performed for each epoch as long as four or more satellite phase observation values are tracked and the necessary geometric shapes are maintained.
RTK MDT mobile data terminal technology's key lies in data processing and data transmission technology. During RTK positioning, the base station receiver needs to transmit observation data (pseudo-range observation values, phase observation values) and known data to the rover receiver in real-time. The data transfer rate required is generally 9600 baud, which is easily achieved on a wireless link.