Ionospheric Parameter Retrieval Method Based on AIS Target Indication

Abstract

The invention discloses an ionized layer parametric inversion method based on AIS target indication. The method includes the steps of obtaining the target positions and movement information of offshore ships on the basis of the AIS, detecting suspected ship targets on the basis of a sky wave radar echo spectrum and through the combination with the AIS target indication area, conducting correlation, fusion and matching on the ship targets detected by radar and the ships indicated by the AIS so as to obtain the route of a radar ship target group, detecting a quasi parabolic ionized layer model required for the ship target positioning on the basis of sky wave radar backscatter sounding, establishing a mean square error equation of the route of the radar ship target group, and obtaining the optimal solution of the ionized layer parameter on the basis of the optimization solution algorithm. By means of the method, the ionized layer parameter model can be obtained without more professional ionized layer detection devices, and the number of devices and the device cost are reduced. The static and dynamic information of a large number of offshore ships can be provided through a ship automatic identification system in real time, the amount of the information serving as input data of the parametric inversion algorithm is large, the inversion accuracy and stability of the ionized layer parameter are improved, and the spatial resolution of the ionized layer parametric inversion is improved.

Description

technical field [0001] The invention relates to the technical field of ionospheric parameter inversion, in particular to an ionospheric parameter inversion method based on AIS target indication. Background technique [0002] The ionosphere has strong space-time characteristics, and the high-frequency radio channel characteristics of the ionosphere directly affect the quality of short-wave radio broadcasting, communication and radar. Therefore, real-time understanding of ionospheric characteristics is of great value to the application of short-wave radio technology. The inversion of ionospheric model parameters is just to meet this demand, and a technology for obtaining ionospheric state parameters was born. [0003] At present, the most widely used methods for short-wave ionospheric detection are ionospheric oblique measurement, vertical measurement and backscatter method. In order to realize sky-wave radar target positioning and tracking, it is generally equipped with mul...

AI Technical Summary

Problems solved by technology

In order to realize sky-wave radar target positioning and tracking, it is generally equipped with multiple ionospheric inclinometers, vertical survey instruments and backscatter instruments. The system construction is not only complicated, but also the station construction, maintenance and operation costs are high

[0004] In the ionospheric inversion problem, scholars at home and abroad generally use the model method, but the accuracy, stability and spatial resolution of most of these methods are difficult to meet the requirements of modern short-wave wireless technology

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