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Method for obtaining artificial target information from target parametric inversion model under forest cover

A target parameter and inversion model technology, applied in the field of microwave remote sensing, can solve the problem of not being able to obtain information about man-made targets

Inactive Publication Date: 2009-04-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the existing PolInSAR image parameter inversion can only obtain the target information of the natural scene, but cannot obtain the relevant information of the man-made target. method of target information

Method used

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  • Method for obtaining artificial target information from target parametric inversion model under forest cover
  • Method for obtaining artificial target information from target parametric inversion model under forest cover
  • Method for obtaining artificial target information from target parametric inversion model under forest cover

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specific Embodiment approach 1

[0082] Specific implementation mode one: the steps of this implementation mode are as follows:

[0083] Step 1. Input the single baseline PolInSAR image data: In the full polarization system, after the electromagnetic waves emitted by the SAR antenna one are scattered by the target, they are simultaneously received by the antenna one and the antenna two, and the received data from the antenna one and the two antennas The PolInSAR data is transmitted to the computer through the four polarization channels HH, HV, VH and VV, and then eight single-baseline PolInSAR image data are obtained through the SAR imaging algorithm, as shown below:

[0084] [ S 1 ] = S hh 1 S hv ...

specific Embodiment approach 2

[0107] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the image input in step one in this embodiment is a multi-baseline PolInSAR image, and in step five, only the obtained in step four The optimal coherence coefficient can be brought into the scattering model.

[0108] Since the image input in this embodiment is a multi-baseline PolInSAR image, the observation data brought by the multi-baseline PolInSAR image can solve the underdetermined problem of the scattering model in the parameter inversion process, so the prior information is no longer needed. Fifth, no prior information is required.

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Abstract

The invention relates to a method for acquiring man-made target information by a target parameter inverse model covered by a forest, which belongs to the field of microwave remote sensing. The method solves the problem that the prior PolInSAR image parameter inversion can only acquire target information of natural scene, and can not acquire man-made target related information. The method can acquire optimized coherent coefficient through performing polarized interfere coherent optimized processing on PolInSAR image data, utilize the known data to establish a scattering model of a man-made target covered by the forest, and acquire related parameters of natural target information and the man-made target information such as vegetation height, extinction coefficient, as well as phase, man-made target height and target amplitude ratio and so on which are related to terrain in the inputted PolInSAR image data through the model. The acquired information can provide basic data for further analysis on a researched area. The method widens the application range of the PolInSAR technology, and can be applied in the fields of forest ecologic parameter detection and man-made target detection.

Description

technical field [0001] The invention relates to a method for obtaining artificial target information through PolInSAR images, and belongs to the field of microwave remote sensing. Background technique [0002] Polarimetric Interferometric Synthetic Aperture Radar (PolInSAR) not only has the characteristics that interferometric radar is very sensitive to the spatial distribution and height of vegetation scatterers, but also has the characteristics that polarimetric radar is very sensitive to the shape and direction of vegetation scatterers. Extracting the vertical structure information of surface vegetation has greater advantages and higher precision than the separate interferometric and polarimetric radars, which further expands the application of PolInSAR in the field of remote sensing. [0003] In remote sensing applications, PolInSAR is a powerful tool. For different scattering mechanisms, different scattering centers can be separated by using polarization interferometry ...

Claims

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Application Information

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IPC IPC(8): G01S13/04G01S13/90
Inventor 邹斌蔡红军张腊梅张钧萍林茂六
Owner HARBIN INST OF TECH
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