X-waveband wave observation radar ocean current inversion preprocessing method

A wave-measuring radar and X-band technology, which is applied in the field of preprocessing the current inversion of X-band wave-measuring radar by using the dispersion relationship of ocean gravity waves.

Inactive Publication Date: 2013-05-15
WUHAN UNIV
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional ocean current inversion algorithm based on X-band wave measuring radar is based on the weighted least squares method. All frequency points of the spectrum transformed by 3D FFT will participate in the calculation. Due to the interference, the ocean current results will be inaccurate, which will lead to the inversion The obtained wave parameters are not accurate
In order to obtain accurate current information, it is necessary to preprocess the radar data and select a relatively accurate frequency point that satisfies the dispersion relationship. At present, the preprocessing of radar data is limited by the maximum current velocity. However, the maximum possible current in the observed sea area The current velocity is unknown, or for the shipborne X-band wave measuring radar, it will be invalid to use the current velocity to limit the echo spectrum

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • X-waveband wave observation radar ocean current inversion preprocessing method
  • X-waveband wave observation radar ocean current inversion preprocessing method
  • X-waveband wave observation radar ocean current inversion preprocessing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0044] Such as figure 1 As shown, the wave number frequency three-dimensional spectrum in Kx-Ky-W space can be obtained after the three-dimensional FFT transformation of the ocean echo image based on the X-band wave measuring radar. For each direction, the K-W spectrum can be extracted from the three-dimensional spectrum. Two-dimensional spectrum, for the K-W two-dimensional spectrum in each direction, a curve satisfying the oceanographic gravity wave dispersion relation can be found. For each point on the dispersion relation, the following formula will be satisfied:

[0045] W = gK tanh ( gKh ) + K x U x + K y ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides an X-waveband wave observation radar ocean current inversion preprocessing method based on the ocean gravity wave dispersion relation. Firstly, a relation expression formula which can meet angular frequency and spatial wave number of the dispersion relation is determined through the ocean gravity wave dispersion relation and a corresponding geometrical relation. Secondly, a series of curved line clusters which can meet the relation formula is determined through the determined angular frequency and the spatial wave number for each direction. The determined curved line clusters are judged to find out curved lines which can meet the dispersion relation. Finally, the determined dispersion relation curved lines are used for carrying out ocean inversion to get accurate ocean current information. The X-waveband wave observation radar ocean current inversion preprocessing method based on the ocean gravity wave dispersion relation is simple in algorithm and high-efficiency and provides the preprocessing method for ocean dynamics parameter inversion of a shore-based X-waveband wave observation radar and a boat-mounted X-waveband wave observation radar and improves accuracy of parameter inversion of ocean currents and ocean waves.

Description

technical field [0001] The invention belongs to the technical fields of radio physics and marine science, and in particular relates to a method for preprocessing X-band wave-measuring radar ocean current inversion by utilizing the dispersion relationship of ocean gravity waves. Background technique [0002] X-band wave measuring radar is widely used in maritime traffic management and maritime navigation, and has gradually developed into a new method for marine environment monitoring in the past 30 years. When the X-band wave measuring radar electromagnetic wave is incident on the sea surface, the capillary waves caused by the wind that are equivalent to the radar wavelength will produce Bragg scattering, and the backscattered echoes will be received by the radar receiver to form "sea clutter", while the wavelength Longer gravitational waves appear on sea clutter images through hydrodynamic modulation, tilt modulation, and shadow modulation on capillary waves. Therefore, X-ba...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01S7/02
Inventor 吴雄斌沈志奔马克涛王立陈骁锋李亚雷
Owner WUHAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products