An inversion method and device based on polarization interferometric synthetic aperture radar

An interferometric synthetic aperture and inversion technology, which is applied to measurement devices, radio wave reflection/re-radiation, utilization of re-radiation, etc. The effect of reducing the linear fit error

Active Publication Date: 2015-08-19
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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  • An inversion method and device based on polarization interferometric synthetic aperture radar
  • An inversion method and device based on polarization interferometric synthetic aperture radar
  • An inversion method and device based on polarization interferometric synthetic aperture radar

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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

An inversion method based on Polarimetric Interferometric Synthetic Aperture Radar (PoLInSAR) is provided, which includes: acquiring a set of PoLInSAR image data of an object to be measured, and performing line fitting on a correlation coefficient estimation value acquired from the PoLInSAR image data by using total least squares to determine a ground surface phase estimation value of the object to be measured; acquiring a volume scattering decorrelation coefficient through a correlation regional boundary acquired from the PoLInSAR image data and a fitted line; performing inversion on the object to be measured by establishing a lookup table to acquire an inversion parameter of the object to be measured as a parameter estimation value of the object to be measured. An inversion apparatus based on Polarimetric Interferometric Synthetic Aperture Radar (PoLInSAR) is provided accordingly. By adopting technical solutions of the disclosure, inversion precision can be improved, and the technical solutions of the disclosure are particularly applicable to the inversion of a forest parameter.

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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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S7/02
CPCG01S2013/9076G01S13/9035G01S13/9023G01S13/9076
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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