Method for estimating ionosphere height based on stationary object double path echo information of high frequency ground wave radar

Abstract

The invention relates to a method for estimating ionosphere height and discloses a method for estimating ionosphere height based on stationary object double path echo information of a high frequency ground wave radar to solve a problem of complexity and a time consuming defect in a conventional indirect detection method. The method disclosed in the invention comprises the following steps: in a first step, a stationary object echo information set and a matching confirmed island object ground wave echo information set are obtained according to stationary object echo information of the high frequency ground wave radar; in a second step, a sky wave echo delay sequence is obtained from the stationary object echo information set, and a delay sequence in the confirmed island object ground wave echo information set and a matched sky wave echo delay sequence are used to form a pair delay set; in a third step, a sky wave echo path distance is corrected according to the pair delay set; in a fourth step, an estimated value of ionosphere height in a high frequency ground wave radar detection direction is obtained according to the corrected sky wave echo path distance. The method is applied to direct estimation of the ionosphere height, high frequency ground wave radar object positioning and other occasions for obtaining high sea object information.

Description

technical field [0001] The invention relates to a method for ionospheric height estimation, belonging to the fields of high-frequency ground wave radar target detection and ionospheric height estimation. Background technique [0002] The ionosphere is a very important link in modern communication. Space short-wave communication and sky-wave radar can only be realized by using its reflection effect on electromagnetic waves. The current research on ionospheric height estimation mainly uses detectors for direct detection and indirect detection. Direct detection uses carrier rockets or earth satellites to place ionospheric detectors at high altitudes to monitor ionospheric parameters in real time; indirect detection receives electromagnetic waves reflected from the ionosphere, analyzes their echo characteristics, and then obtains ionospheric parameters. Some indirect detection methods are very complicated and time-consuming. The direct detection method is very expensive becaus...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the complex and time-consuming problem of the existing indirect detection method. The present invention provides a method for ionospheric height estimation based on the dual-path echo information of stationary targets of high-frequency ground wave radar

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