Polarization SAR model decomposition evaluation method based on electromagnetic scattering simulation

Abstract

The invention discloses a polarization SAR model decomposition evaluation method based on electromagnetic scattering simulation. The method comprises the steps of (S1) setting surface electromagneticgeometric parameters, aircraft flight parameters and radar satellite position parameters and calculating a surface real beta value of a target scene by using a classical forward model, (S2) processingthe polarization SAR simulation data of the target scene by using a polarization SAR model decomposition method to be evaluated and carrying out inversion to obtain an inversion beta value, and (S3)calculating a mean square root error of the inversion beta value and the surface real beta value, and evaluating the polarization SAR model decomposition method to be evaluated with a principle that the smaller the mean square root error is, the better the effect of the decomposition method is. According to the scheme of the invention, the electromagnetic scattering simulation theory and the polarization SAR model decomposition theory are organically combined, a decomposition algorithm is evaluated from the perspective of electromagnetic wave simulation and model decomposition, the method is fair and just, and a reference can be provided for the selection of an excellent model decomposition method for different application scenes.

Description

technical field [0001] The invention relates to the technical field of microwave remote sensing, in particular to a polarization SAR model decomposition and evaluation method based on electromagnetic scattering simulation. Background technique [0002] Polarimetric SAR (abbreviation of Synthetic Aperture Radar, Chinese name is Synthetic Aperture Radar) model decomposition is a bridge between polarimetric SAR data and polarimetric SAR applications, and is also an important part of polarimetric SAR data interpretation. Polarization SAR is widely used in ground object classification, geological disaster monitoring, and marine environment monitoring, which is of great significance to national economic construction and social development. [0003] In the past few decades, microwave remote sensing technology has developed rapidly with the development of hardware system, signal processing technology and interpretation theory. Microwave remote sensors can work day and night and are...

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Problems solved by technology

After a lot of research, it is found that the above-mentioned decomposition evaluation methods have some defects: due to the inability to quantitatively measure the proportion of a certain scattering component on the ground surface, the evaluation method of qualitative description cannot determine which decomposition method is better; the partial decomposition method limits the scattering component to Positive value, there is no case where the scattering component is negative, which makes it meaningless to use the negative value ratio of the scattering component to evaluate; the quantitative evaluation based on Monte Carlo simulation is restricted by the decomposition model framework, and models with different frameworks cannot be evaluated fairly and equitably ; The second evaluation requires a lot of financial and material resources to carry out field surveys

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