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Performance Assessment of Single Frequency GNSS RTK/MEMS-IMU Combined Positioning
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Abstract
With the increasing demand for high-precision positioning of civilian positioning terminals, the combination of single-frequency global navigation satellite system(GNSS) Real-Time Kinematics (RTK) and Inertial Measurement Unit of the Micro Electronic Mechanical System(MEMS-IMU) has been selected for high-precision positioning in the industry with its advantages of low cost, miniaturization and high precision. Based on the extended Kalman filter single-frequency RTK and Ultra low-cost MEMS-IMU loose combination positioning algorithm, the data is collected and tested in static scenes, and dynamic scenes. The experimental results show that: (1) In the static scenes, the combined positioning accuracy is better than 1.5cm, which is equivalent to the accuracy of the dual-frequency commercial receiver; (2) In the dynamic scenes, the single-frequency GNSS RTK positioning accuracy is better than 3cm, and the combined positioning accuracy is better than 5cm. In general, the combined positioning in static and dynamic modes can provide reliable high-frequency centimeter-level positioning.
Title: Performance Assessment of Single Frequency GNSS RTK/MEMS-IMU Combined Positioning
Description:
Abstract
With the increasing demand for high-precision positioning of civilian positioning terminals, the combination of single-frequency global navigation satellite system(GNSS) Real-Time Kinematics (RTK) and Inertial Measurement Unit of the Micro Electronic Mechanical System(MEMS-IMU) has been selected for high-precision positioning in the industry with its advantages of low cost, miniaturization and high precision.
Based on the extended Kalman filter single-frequency RTK and Ultra low-cost MEMS-IMU loose combination positioning algorithm, the data is collected and tested in static scenes, and dynamic scenes.
The experimental results show that: (1) In the static scenes, the combined positioning accuracy is better than 1.
5cm, which is equivalent to the accuracy of the dual-frequency commercial receiver; (2) In the dynamic scenes, the single-frequency GNSS RTK positioning accuracy is better than 3cm, and the combined positioning accuracy is better than 5cm.
In general, the combined positioning in static and dynamic modes can provide reliable high-frequency centimeter-level positioning.
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