How does the high precision GNSS RTK antenna use carrier phase differential technology to achieve high-precision positioning?
Publish Time: 2024-12-26
High-precision GNSS RTK (Real-Time Kinematic) antenna is the pinnacle of modern positioning technology. Its core lies in the clever use of carrier phase differential technology to achieve centimeter-level or even millimeter-level precise positioning.
The realization of this technology first depends on the close cooperation between the base station and the mobile station. The base station is usually located at a location with a known precise position. It receives radio frequency signals from multiple GNSS satellites and pre-processes them through internal low-noise amplifiers and high-precision clocks. After that, the base station will calculate differential correction data, which is used to correct errors in satellite signals, such as satellite clock errors, atmospheric delays, multipath effects, etc.
The mobile station, that is, the antenna at the location to be measured, also receives signals from GNSS satellites. But unlike the base station, the mobile station also receives differential correction data sent by the base station in real time. By comparing the phase difference of the satellite signals received by the base station and the mobile station, the RTK receiver can calculate the precise position of the mobile station in real time.
The key to carrier phase differential technology lies in its high precision and real-time performance. Since the carrier frequency is much higher than the frequency used for pseudo-range measurement, carrier phase measurement can provide higher accuracy. At the same time, real-time differential positioning technology can instantly correct satellite signals to ensure the real-time and accuracy of positioning results.
In addition, high precision gnss rtk antenna further improves positioning accuracy by optimizing antenna design and algorithms. For example, the use of multipath suppression technology and advanced filtering algorithms can reduce the impact of multipath effects and noise on positioning results.
In summary, high precision gnss rtk antenna achieves unprecedented high-precision positioning through carrier phase differential technology. This technological breakthrough not only promotes innovation and development in surveying and mapping, agriculture, construction, and intelligent transportation, but also provides strong technical support for us to explore the unknown and perform precise operations.
