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Inversion method based on polarization interference synthetic aperture radar and device

An interference synthetic aperture and inversion technology, which is applied in the directions of measurement devices, radio wave reflection/re-radiation, and re-radiation, can solve the problem of underestimation of forest heights, improve inversion accuracy, and the method is simple and easy. The effect of reducing the fitting error of the straight line

Active Publication Date: 2013-09-25
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

The traditional volume scattering decorrelation coefficient can be approximated as the HV channel correlation coefficient, but this will cause an underestimation of the forest height

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  • Inversion method based on polarization interference synthetic aperture radar and device
  • Inversion method based on polarization interference synthetic aperture radar and device
  • Inversion method based on polarization interference synthetic aperture radar and device

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Embodiment Construction

[0045] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0046] figure 1 It is a schematic diagram of the implementation process of the present invention based on the polarimetric interference synthetic aperture radar inversion method, such as figure 1 As shown, the method includes:

[0047] Step 101: Obtain a set of PoLInSAR image data of the target to be measured, and use the integral least squares method to linearly fit the estimated correlation coefficient obtained from the PoLInSAR image data, and determine the surface phase estimation of the target to be measured value;

[0048] Wherein, the PoLInSAR image data includes four main images and four auxiliary images.

[0049] Specifically, under the condition of polarization interference, two antennas are used to obtain the polarization data of the same target to be measured, wherein the first antenna obtains the main i...

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Abstract

The invention discloses an inversion method based on a polarization interference synthetic aperture radar. The inversion method includes the steps of step 1, obtaining one set of image data of the polarization interference synthetic aperture radar (PoLInSAR) of a target to be tested, carrying out straight line fitting on correlation coefficient estimated values obtained from the PoLInSAR image data by utilizing total least squares, and determining the earth surface phase estimated value of the target to be tested, step 2, obtaining a volume scattering decorrelation coefficient through a correlated area bound obtained from the PoLInSAR image data and the fitted straight line, step 3, carrying out inversion on the target to be tested through establishing a lookup table, obtaining inversion parameters of the target to be tested and regarding the inversion parameters as the parameter estimates of the target to be tested. The invention further discloses an inversion device based on the polarization interference synthetic aperture radar. According to the technical scheme, inversion accuracy can be improved, and the technical scheme is especially suitable for being used in inversion of forest parameters.

Description

technical field [0001] The invention relates to the application technology of polarization interference synthetic aperture radar (PoLInSAR), in particular to an inversion method and device based on polarization interference synthetic aperture radar. Background technique [0002] In recent years, the inversion of forest parameters by using polarimetric interferometric synthetic aperture radar data has been a hot research topic. The traditional forest parameter inversion method is a traditional three-stage inversion method proposed by Cloude scholars and Pathanassiou scholars. This method is based on the RVOG two-layer vegetation model, and the inversion process is divided into correlation coefficient estimation, linear ground fitting, and surface phase estimation. 1. Volume scattering decorrelation estimation and parameter estimation are three steps; among them, the linear fitting error and volume scattering decorrelation estimation error have a greater impact on the inversio...

Claims

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Application Information

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IPC IPC(8): G01S13/90G01S7/02
CPCG01S13/9023G01S13/9076
Inventor 许丽颖陆萍萍李世强禹卫东
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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