Navigation radar image sea surface wind direction inversion method based on wave number energy spectrum

Abstract

The invention belongs to the field of sea surface wind direction inversion through a remote sensing means, and particularly relates to a navigation radar image sea surface wind direction inversion method based on a wave number energy spectrum. The method comprises the steps of preprocessing a radar image, extracting sea surface static characteristics and inverting sea surface wind direction information. According to the navigation radar image sea surface wind direction inversion method based on the wave number energy spectrum, a space domain does not need to be reduced, the space domain can automatically adapt to wind stripes of different scales, the wind direction can be measured under different sea conditions, an error result is stable, and engineering availability is high. According to the navigation radar image sea surface wind direction inversion method based on the wave number energy spectrum, only the wind stripe energy spectrum is extracted through wave number energy spectrum wave number scale separation, the wind direction inversion precision is improved, and the interference of the noise of other scales is reduced.

Description

technical field [0001] The invention belongs to the field of retrieving the sea surface wind direction by means of remote sensing, and in particular relates to a method for retrieving the sea surface wind direction based on a navigation radar image of a wave number energy spectrum. Background technique [0002] Sea surface wind field is an important source of power at the sea-steam interface, which is of great significance to navigation operations and ocean dynamics research. Sea surface wind field information mainly includes two aspects of sea surface wind direction and sea surface wind speed, and the present invention is used to invert the information of sea surface wind direction. [0003] Traditional wind direction information acquisition methods are mainly divided into two categories: site-based on-site measurement and remote sensing measurement. [0004] Site-based on-site measurement mainly includes shore-based wind vane single-point measurement, buoys, observation s...

AI Technical Summary

Problems solved by technology

However, there are still some insurmountable defects: For airborne remote sensing technology, aircraft navigation is greatly affected by weather, and it cannot work under severe marine weather conditions

However, the scale of the wind stripes is between 100 and 500. It is impossible to automatically find the appropriate reduced image resolution in the project, and the fixed reduced image resolution will cause the wind direction inversion error to be unstable, which will lead to the inability of this algorithm. practical application

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