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Multi-baseline insar phase unwrapping algorithm based on mixed integer optimization model

An optimization model, mixed integer technology, used in radar detection, communication fields

Active Publication Date: 2022-01-18
NORTHWEST A & F UNIV
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Problems solved by technology

[0008] The present invention is aimed at the engineering application of the Interferometric Synthetic Aperture Radar InSAR data processing technology in the above-mentioned prior art to terrain surveying. The present invention can be used for multi-baseline InSAR phase unwrapping to further improve the accuracy of the DEM establishment on the earth's surface. The existing interferometric phase diagram When the wrapping method cannot meet the performance requirements required for processing, a multi-baseline InSAR phase unwrapping algorithm based on a mixed integer optimization model is proposed

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  • Multi-baseline insar phase unwrapping algorithm based on mixed integer optimization model

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[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] Refer to attached figure 1 , the specific implementation steps of the present invention are as follows:

[0032] Step 1, input SAR image data and auxiliary parameters.

[0033] The main image data obtained by the main antenna of the interferometric synthetic aperture radar InSAR and the auxiliary image data obtained by the auxiliary antenna of the interferometric synthetic aperture radar InSAR that have been fully registered with the main image and the auxiliary system parameters and imaging processing used in the processing process The parameters are input into the system, and the input primary and secondary SAR images must meet the quality requirements of interferometric processing in terms of coherence and imaging quality.

[0034] Step 2, complex interferogram.

[0035] Perform interferometric processing on the input primary and secondary SAR images to ob...

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Abstract

The invention discloses a multi-baseline InSAR phase unwrapping algorithm based on a mixed integer optimization model. The implementation steps of the invention are: (1) inputting primary and auxiliary SAR complex image data; (2) generating a complex interference phase map through interference processing; (3) Obtain the local optimal window; (4) Construct a mixed integer optimization model according to the InSAR system parameters and the local optimal window parameters; (5) Calculate the fuzzy integer of the complex interferometric phase diagram; (6) Calculate the absolute value of each interferometric phase diagram Phase; (7) Output the DEM of the entire scene. In the case of multiple baselines, the invention can complete high-quality phase unwrapping of the interferometric InSAR image after registration, meet the actual engineering performance requirements of high-quality interferometric synthetic aperture radar InSAR processing, and obtain high-quality surveying and mapping products.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to data processing for generating a digital elevation model of the earth's surface by an Interferometric Synthetic Aperture Radar (InSAR) in the technical field of radar detection. The present invention can be used in multi-baseline InSAR, because SAR images with different incident angles generate two or more interferograms in the same area, and then process the generated interferometric phase images to extract the terrain height of each scattering unit in the observation scene value. Background technique [0002] Interferometric synthetic aperture radar (SAR) combines two or more coherent SAR images from different angles of view in the same scene on the basis of obtaining two-dimensional information in the distance dimension and azimuth dimension of the actual three-dimensional scene by using the traditional technology of synthetic aperture radar (SAR). Interference pr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
CPCG01S13/904G01S13/9023G01S13/9058
Inventor 郭交尉鹏亮段凯文刘健靳标
Owner NORTHWEST A & F UNIV
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