Differential positioning system and method based on satellite

Abstract

The embodiment of the invention discloses a differential positioning system and method based on a satellite, a data center receives differential correction information uploaded by each differential station, and the differential correction information is determined and obtained by the differential stations according to two paths of initial differential correction information calculated by a first differential processing module and a second differential processing module. The first differential processing module and the second differential processing module have different hardware architectures and differential correction algorithms, so that the problem of differential correction information errors caused by single hardware faults or algorithm errors is avoided. When the data center receives a positioning request sent by the terminal equipment, a target differential station meeting the differential correction requirement is selected according to the position information of the terminal equipment and the position information of each differential station. The appropriate differential station is selected based on the position information, so that the selected differential correction information is more suitable for the actual coordinate condition of the terminal equipment. Two paths of initial differential correction information are calculated through two different modes so that the fault resistance of the satellite system is improved.

Description

technical field [0001] The invention relates to the technical field of data security, in particular to a satellite-based differential positioning system and method. Background technique [0002] Satellite differential positioning technology can achieve high-precision positioning, which can be accurate to centimeter level. The basic principle of satellite differential positioning is to deploy differential reference stations at several known coordinate points, continuously track and observe navigation satellite signals, calculate differential corrections in real time and report them to the data center. The terminal equipment observes the navigation satellite signal, obtains a rough position, and sends a differential positioning request to the data center, obtains the differential correction data sent by the data center, and corrects the positioning result to achieve high-precision positioning. [0003] The existing satellite differential positioning technology improves positi...

AI Technical Summary

Problems solved by technology

[0003] The existing satellite differential positioning technology improves positioning accuracy, but there are data security issues. The main hidden dangers include: terminal equipment may output wrong differential correction values ​​or positioning results due to positioning algorithm or software errors (BUG), causing positioning errors

In addition, any part of the satellite, such as internal components, sensors, hardware, and software of the system, may fail or even fail during the long-term operation of the system, resulting in inaccurate final output positioning information, resulting in terminal equipment based on the positioning information. When positioning, cause a positioning error

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