Regional Five-Dimensional Imaging With Local Star Networks
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Solution Overview
Problem
Existing SAR tomography technologies face challenges in achieving complete coverage of dense urban areas due to limitations in the reference network, affecting imaging quality.
Innovation Solution
A regional five-dimensional imaging method involving preprocessing of interference measurement data, detecting reliable single permanent scatterers (SPSs) through a region growth network, constructing a local star network, and identifying double permanent scatterers (DPSs) to perform five-dimensional imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a reference network technology based on permanent scatterers is applied to SAR tomography, then atmosphere phase screen removal is not needed, but the network cannot cover the entire research area, affecting imaging quality
Solution Approach 1:
The patent divides the reference network into multiple segments: a global reference network for atmospheric phase screen removal and regional reference networks for local imaging. This segmentation allows each network to serve its specific function effectively, with the global network providing atmospheric correction and regional networks enabling complete area coverage without compromising imaging quality
Solution Approach 2:
The patent introduces an intermediary approach by using multiple reference networks that cooperate to cover the entire research area. The global reference network acts as a mediator for atmospheric effects, while regional reference networks serve as intermediaries for local imaging, together achieving both atmospheric correction and complete area coverage
2Shape
If multi-baseline simultaneous imaging is used, then three-dimensional imaging effect is achieved, but atmosphere phase screen affects imaging quality
Solution Approach 1:
The patent extracts and removes the atmosphere phase screen effect from the imaging process by using the global reference network to calculate and eliminate atmospheric phase errors before the tomographic imaging is performed. This separation allows the multi-baseline imaging to achieve three-dimensional results without atmospheric contamination
Solution Approach 2:
The patent performs preliminary atmospheric phase screen removal using the global reference network before the main tomographic imaging processing. This preliminary action eliminates atmospheric effects in advance, allowing the subsequent multi-baseline imaging to produce high-quality three-dimensional results without atmospheric interference
Data Source
AI summary
Disclosed are a regional five-dimensional imaging method, an apparatus, a device, and a storage medium. The method includes: detecting, based on the differential interference data, through a preset region growth network, reliable single permanent scatterers (SPSs) in a target region corresponding to the target interference measurement data; constructing, based on all SPSs in the preset region growth network, a local star network; and detecting, through the local star network, a target remaining SPS and all double permanent scatterers (DPSs) in the target region, and performing, based on the reliable SPSs, the target remaining SPS and all the DPSs, five-dimensional imaging on the target region.