Multilateral positioning system based on distributed clock

Abstract

The invention relates to a multilateral positioning system based on a distributed clock. The multilateral positioning system comprises one central station and at least four receiving stations; the central station and each receiving station respectively have a clock reference using an atomic clock as a core; the central station calculates the accurate position of a positioned target according to the signal arrival time difference of different receiving stations; the receiving stations are distributed at different positions on a target field; the receiving stations are mutually independent; furthermore, each receiving station is provided with a sensor used for receiving an answer signal given out by the target and recording an arrival moment; and the receiving stations carry out data communication with the central station through an optical fiber link. The multilateral positioning system provided by the invention adopts an advanced time difference positioning technique; the sense positioning precision of the multilateral positioning system is superior to 1 m; the three-dimensional positioning precision is superior to 5 m; and the sense monitoring requirements of large and medium complicated airports are met. The system is lower in construction cost and use cost, high in positioning precision and high in date replacement rate, is easy to erect, and can be widely used in the field of air traffic management and surveillance.

Description

technical field [0001] The present invention relates to a positioning system, specifically a distributed multilateral positioning system based on atomic clock synchronization technology, and further relates to a multilateral positioning system for an airport to a space vehicle. Background technique [0002] At present, the radar surveillance equipment of the airport air traffic control system mainly includes PSR (Primary Surveillance Radar, primary surveillance radar), SSR (Secondary Surveillance Radar, secondary surveillance radar) and so on. PSR detects targets by actively emitting electromagnetic waves and receiving detection echoes. It can only obtain target distance and azimuth information, has no aircraft identification capability, small coverage, high construction and operation maintenance costs, and ground station construction is limited by terrain; SSR applies aircraft response The response signal transmitted by the PSR can obtain more monitoring target information ...

AI Technical Summary

Problems solved by technology

PSR detects targets by actively emitting electromagnetic waves and receiving detection echoes. It can only obtain target distance and azimuth information, has no aircraft identification capability, small coverage, high construction and operation maintenance costs, and ground station construction is limited by terrain; SSR applies aircraft response The response signal transmitted by the PSR can obtain more monitoring target information than the PSR, but the construction and operation and maintenance costs are also high, the data update rate is low, and the ground station construction is also limited by the terrain

These traditional air traffic control radar surveillance systems generally have the disadvantages of high cost, low positioning accuracy, and difficulty in erection. Therefore, it is urgent to find a new type of air traffic control surveillance system with low cost, high positioning accuracy, and easy erection to adapt to my country's air transport. rapid development of the industry

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