Forwarding type GNSS dynamic measurement accuracy testing and evaluating method

Abstract

The invention relates to a forwarding type GNSS dynamic measurement accuracy testing and evaluating method, which comprises the steps of selecting a real motion carrier of a GNSS measurement system to be tested to act as a motion testing platform, building a satellite navigation signal forwarding environment on the motion carrier by using a satellite navigation signal repeater, and enabling real-time position information acquired by a mobile station of the GNSS measurement system to be tested and a comparative measurement receiver to be equivalent to a mounting part of a forwarding antenna; then designing a carrier motion environment, laying a reference station network, and enabling the comparative measurement receiver to be closer to a reference station so as to ensure acquisition of a position reference value with higher accuracy; acquiring a real-time position reference value of the mobile station of the GNSS measurement system to be tested under a time alignment condition by using test data interpolation after a dynamic test, and comparing a real-time measurement value of the mobile station of the GNSS measurement system with the reference value to acquire the dynamic measurement accuracy of the GNSS measurement system to be tested.

Description

technical field [0001] The invention belongs to the technical field of GNSS terminal testing, and is especially suitable for testing and evaluating the dynamic measurement accuracy of various vehicle-mounted and airborne GNSS high-precision measurement systems. Background technique [0002] With the gradual construction and development of the world's four major navigation systems (the Beidou system of China, the GPS system of the United States, the GLONASS system of Russia, and the Galileo system of Europe), the application of the navigation industry has become more and more extensive. Since the GNSS single-point positioning accuracy is at the meter level, the current GNSS measurement system based on carrier phase difference technology includes a base station and a rover. The base station is placed at a known point to provide carrier phase difference information. The rover is installed on a moving carrier and receives Differential information calculates the position in real ...

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Problems solved by technology

The key to this method is that the reference equipment obtains the attitude information. At present, the photography method or the total station method are mainly used, and the comparison equipment needs to be specially developed, and the requirements for the optical communication of the site, the dynamic performance of the attitude measurement equipment, and the time synchronization are relatively high, and The implementation of the project is difficult and difficult to promote

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