Track test system

Abstract

A track test system comprises a plurality of mobile stations, a fixed reference station and at least a mobile reference station; wherein, each reference station comprises a GNSS receiver, control modules, interactive radio stations and main radio stations; the GNSS receiver is used for receiving GNSS signals and generating GNSS differential corrections; each control module is used for transmitting the data interacted between the main radio station and the interactive radio station in the reference station; the interactive radio station in the mobile reference station is used for sending the GNSS differential corrections generated by the reference station to the interactive radio station in the fixed reference station; the main radio station in the fixed reference station is used for sending the GNSS differential corrections generated by the mobile reference station and by the reference station to the mobile stations together; each mobile station is used for selecting one GNSS differential correction generated by the reference station from the received GNSS differential corrections according to the predetermined selection strategy, obtaining the GNSS position information of the mobile station according to the GNSS differential correction and returning the GNSS position information to the selected reference station. The system can expand the range of motion of the moving targets and ensure the real time of data.

Description

technical field [0001] The invention relates to the field of satellite positioning, in particular to a track testing system. Background technique [0002] The track test system is a system for positioning moving targets based on GNSS (Global Navigation Satellite System, Global Navigation Satellite System). Usually, a fixed station is set as a reference station at a reference point in a fixed manner, and a movable station is set as a mobile station on a moving target, and the moving target includes air targets and ground targets; the reference station is generated by receiving GNSS satellite signals The GNSS differential correction number is sent to the mobile station; the mobile station can obtain the position and speed information of the mobile station according to the GNSS differential correction number and the received GNSS satellite signal, and the mobile station sends the position and speed information to the base station; the base station receives The position informa...

AI Technical Summary

Problems solved by technology

[0003] However, when the moving target has a large operating range, the mobile station may exceed the coverage of the base station. At this time, the mobile station will not be able to obtain GNSS differential corrections from the base station, nor can it return the position information to the base station; at this time, It is possible to increase the coverage of the base station by erecting iron towers at the base station and increasing the transmission power, but the cost is high and the range is limited

[0004] In addition, in the current track test system, every time a mobile station is added, a main station needs to be arranged at the base station, and the main station has too many antennas, which will have defects such as difficulty in erection and difficult to solve interference problems

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