A Verification Method for Inversion Accuracy of Microwave Scatterometer Sea Surface Wind Field

Abstract

The invention discloses a verification method for ocean surface wind field retrieval precision of a microwave scatterometer. The method comprises the steps of 1) preprocessing NDBC buoy data; 2) extracting wind data of a single position, and constructing a data set used for verification; 3) preprocessing HY-2A scatterometer data; 4) according to an extracted result in the step 2), traversing all vectors in an eigenvector set A, and extracting the scatterometer data; according to a result in the step 4), traversing all backscattering coefficient set, and performing wind field retrieval; finishing the step 5) to obtain data sets A and B of two eigenvectors, wherein vectors in the data sets A and B are same in quantity and are in one-to-one correspondence; and by adopting two indexes including a root-mean-square error and a mean absolute error, analyzing the data sets A and B to obtain a verification result of the wind field retrieval precision of the scatterometer. According to the position of the wind data of the single position, secondary processing of the scatterometer data is performed; and under the condition of not considering a satellite positioning error, accurate spatial matching is realized, so that the accuracy of a check result is improved.

Description

technical field [0001] The invention belongs to the technical field of marine remote sensing, and in particular relates to a method for verifying the inversion accuracy of a microwave scatterometer sea surface wind field. Background technique [0002] The sea surface wind field is an important factor affecting waves, currents, and water masses and a basic parameter of ocean dynamics. It is of great value in improving the accuracy of global atmospheric and ocean dynamics forecast models. At the same time, the sea surface wind vector is the main factor affecting navigation, sea operations, fishery production, etc., and it is the key to optimize routes, guarantee routes, avoid typhoons, and search and rescue work. Therefore, the observation of sea surface wind vectors is of great significance [1] . [0003] Satellite remote sensing has become the main means of global wind vector observation due to the advantages of large-area synchronous measurement, fast acquisition speed, la...

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Problems solved by technology

[0013] The purpose of the present invention is that there is a relatively large distance between the matched single-site wind data and the scatterometer wind field, and accurate spatial correspondence cannot be realized. The traditional method of using single-site wind data to check the scatterometer wind field is not accurate enough. To solve problems such as the inability to guarantee the authenticity of the test results, the local wind field reconstruction technology is used to verify the inversion accuracy of the scatterometer wind field, and to provide a verification method for the inversion accuracy of the microwave scatterometer sea surface wind field

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