Method for forming wave field through high-frequency ground wave radar

Abstract

The invention provides a method for forming a wave field through high-frequency ground wave radar. The method is used for extracting the effective wave height from high-frequency ground wave radar echoes, and the wave field is obtained through the wave height inverse algorithm. The wave height extracting algorithm is acquired according to the specific value of a first-order peak to a second-order peak in the radar echo Doppler spectrum, the obtained effective wave height can be used for estimating the azimuth angle through a multiple signal classification (MUSIC) algorithm, and thus azimuth information of the wave height is obtained. When the extracted effective wave height includes azimuth angle information and distance information at the same time, wave height distribution of the radar within the range of a detected sea area can be obtained, and accordingly the wave field is formed. An initial wave field is subjected to subsequent treatment including replacement, interpolation and smoothness, and then the final wave field can be obtained. The wave field forming algorithm is not only applied to a narrow beam radar system but also applied to a compact-array wide beam radar system.

Description

technical field [0001] The invention relates to a method for forming a wave field by a high-frequency ground wave radar, which is a method for extracting an effective wave height by using the ratio of the first and second order peaks of the ocean echo spectrum of the high-frequency ground wave radar, and forming a wave field. Background technique [0002] High-frequency ground wave radar has been used in the monitoring of ocean surface dynamic parameters for more than 30 years. The extraction of ocean currents has been developed very maturely, and the extraction technology of effective wave height has also been greatly developed. Various wave height extraction Algorithms have been proposed and great achievements have been made. However, the formation of wave fields and the acquisition of effective wave heights in large-scale sea areas are still in the stage of development and research. The acquisition of wave fields is of great help to marine research activities, fisheries ...

AI Technical Summary

Problems solved by technology

The main difficulty in obtaining the wave field lies in the extraction of wave height and azimuth information. The current main method is to solve the azimuth problem by performing beamforming with a large-aperture phased array antenna, which is not applicable in a wide-beam radar system with a compact array.

Considering that the narrow beam radar system has some unavoidable disadvantages, such as: 1) The site selection of the radar station requires a relatively flat and narrow coastline; 2) It is more difficult to install and erect; 3) Higher operation and maintenance costs, how to It is very meaningful to solve the problem of obtaining azimuth information by wide-beam radar and then forming a wave field

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