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Surface flow measurement method based on monostation shipborne high-frequency ground wave radar

A high-frequency ground wave radar and measurement method technology, applied in fluid velocity measurement, radio wave measurement system, measurement device, etc., can solve the problems of high measurement cost, small remote sensing area, difficult synchronization detection, etc. The effect of large remote sensing area and improving observation efficiency

Active Publication Date: 2015-05-27
HARBIN INST OF TECH
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  • Summary
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  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems of difficult synchronous detection, small remote sensing area, high measurement cost and low observation efficiency in the traditional shore-based high-frequency ground wave radar using a two-station measurement scheme to measure the surface flow vector field. Surface flow measurement method based on single-station shipborne high-frequency ground wave radar

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  • Surface flow measurement method based on monostation shipborne high-frequency ground wave radar
  • Surface flow measurement method based on monostation shipborne high-frequency ground wave radar
  • Surface flow measurement method based on monostation shipborne high-frequency ground wave radar

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specific Embodiment approach 1

[0022] Specific implementation mode one: see figure 1 , 2 and 3 illustrate the present embodiment, a kind of surface flow measurement method based on single-station shipborne high-frequency ground wave radar described in the present embodiment, it comprises the following steps:

[0023] The first step is to divide the measured sea area into multiple fan-shaped grids with equal intervals and equal angles according to the system parameters of the ship-borne high-frequency ground wave radar, and each grid is a detection unit;

[0024] The second step is to use the time-space joint spectrum estimation method to estimate the time-space spectrum of the wave echo of each range ring detected by the ship-borne high-frequency ground wave radar, and obtain the measured positive and negative values ​​on each detection unit through spectrum search. The position of the first-order Bragg spectrum peak;

[0025] The third step is to obtain the radial flow velocity on the corresponding detec...

specific Embodiment approach 2

[0030] Specific implementation mode two: see figure 1 , 2 and 3 illustrate this embodiment. The difference between this embodiment and the surface flow measurement method based on a single-station ship-borne high-frequency ground wave radar described in the first embodiment is that in the first step described, according to the ship-borne height The system parameters of the frequency surface wave radar, the specific process of dividing the measured sea area into multiple fan-shaped grids with equal intervals and equal angles is as follows:

[0031] Firstly, the measured sea area is divided into equal intervals according to the system distance resolution of the ship-borne high-frequency ground wave radar, and then the measured sea area is divided into equal angles by using the angular resolution obtained by the azimuth estimation algorithm at this time, so as to obtain the measured sea area All sector grids of .

specific Embodiment approach 3

[0032] Specific implementation mode three: see figure 1 , 2 and 3 illustrate this embodiment, the difference between this embodiment and the surface flow measurement method based on a single-station shipborne high-frequency ground wave radar described in the second embodiment is that in the second step, the time-space The joint spectrum estimation method estimates the space-time spectrum of the wave echo of each distance ring detected by the ship-borne high-frequency ground wave radar, and obtains the position of the positive and negative first-order Bragg spectrum peaks measured on each detection unit through spectrum search. The specific process is,

[0033] The second step, the wave echo covariance matrix R of each distance ring detected by the shipborne high-frequency ground wave radar oc Perform feature decomposition to get

[0034] R oc = Σ ...

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Abstract

A surface flow measurement method based on a single-station ship-borne high-frequency ground-wave radar belongs to the field of space-time processing of ship-borne high-frequency ground-wave over-the-horizon radar signals and the field of ocean surface flow remote sensing. It solves the problems of difficult synchronous detection, small remote sensing area, high measurement cost and low observation efficiency of the traditional shore-based high-frequency ground wave radar using a dual-station measurement scheme to measure the surface flow vector field. The measured sea area is divided into multiple fan-shaped grids, and each grid is a detection unit; the position of the measured positive and negative first-order Bragg spectrum peaks on each detection unit is obtained by using the time-space joint spectrum estimation method and spectrum search, and Obtain the radial flow velocity on the corresponding detection unit to obtain the radial flow field distribution in the measured sea area; use the least square method to obtain the optimal surface flow vector field on each whole; use multiple measurement moments in the same detection unit The measured optimal surface flow vector field is weighted and averaged to obtain the surface flow vector field in the measured sea area. Specifically for the measurement of ocean surface currents.

Description

technical field [0001] The invention belongs to the field of space-time processing of ship-borne high-frequency ground wave over-the-horizon radar signals and the field of ocean surface flow remote sensing. Background technique [0002] High-frequency ground wave (surface wave) radar utilizes vertically polarized high-frequency electromagnetic waves to propagate on the surface of seawater, which has the characteristics of small propagation attenuation and good diffraction characteristics, and can provide good detection means for over-the-horizon target detection and ocean dynamic process telemetry . Compared with traditional marine monitoring methods, high-frequency ground wave radar has the advantages of long operating distance, wide coverage, high detection accuracy, good real-time performance, and all-weather service. It has broad application prospects in scientific research and other aspects. [0003] Theoretically, the positive and negative first-order Bragg peaks of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P5/00G01P5/18G01S13/88
Inventor 谢俊好王中宝冀振元李扬
Owner HARBIN INST OF TECH
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