Multi-frequency tomography SAR three-dimensional imaging method
Through the multi-frequency tomography SAR method, the tomography process is combined with multiple working frequencies and baselines, the problem of low observation efficiency of tomography SAR three-dimensional imaging is solved, and efficient three-dimensional imaging is achieved.
CN119689469AActive Publication Date: 2025-03-25BEIJING INST OF TECH
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Patent Information
- Application Number
- CN202411679683.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2044-11-22
AI Technical Summary
Technical Problem
Tomography SAR three-dimensional imaging has low observation efficiency and takes a long time or even months or years to complete the observation, which limits its application in three-dimensional mapping.
Method used
The multi-frequency tomography SAR three-dimensional imaging method is adopted, and the tomography process is carried out by combining multiple working frequencies and multiple baselines, and the three-dimensional imaging is completed with a limited number of observations, improving the observation efficiency.
Benefits of technology
With a limited number of observations, three-dimensional imaging with the same imaging quality as traditional tomographic SAR is achieved, greatly improving the observation efficiency.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention belongs to the technical field of synthetic aperture radars, and particularly relates to a multi-frequency tomography SAR three-dimensional imaging method. The method specifically comprises the following steps of: firstly, observing for multiple times at different positions of a space by utilizing an SAR load to obtain SAR images with different working frequencies; secondly, performing registration processing on the acquired SAR image to enable image pixels of the same coordinate grid to correspond to the same scattering unit on the ground; thirdly, performing interference processing on the SAR images with the same working frequency to obtain an expectation of an interference signal, performing amplitude normalization processing based on the expectation of the interference signal, and constructing an interferogram stack for multi-frequency tomography processing; and finally, performing elevation estimation based on the interferogram stack to complete three-dimensional imaging.
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