研究目的
To address the defocusing phenomena in high resolution space-borne SAR images of moving ship targets by developing a novel ISAR-based imaging algorithm.
研究成果
The proposed ISAR-based imaging algorithm effectively addresses the defocusing phenomena in SAR images of moving ship targets, demonstrating significant improvement in image quality through simulation and real data validation. This method serves as a viable supplement to existing SAR ground processing systems for acquiring refocused products of moving targets.
研究不足
The study is limited by the reliance on simulation and specific real data (TerraSAR-X) for validation. The effectiveness of the ISAR-based imaging algorithm may vary under different sea conditions and with other types of moving targets.
1：Experimental Design and Method Selection:
The study involves the development of a novel ISAR-based imaging algorithm for moving ship targets, incorporating spatial geometric modeling of space-borne SAR and analysis of motorial characteristics of moving ship targets.
2：Sample Selection and Data Sources:
Simulation and real data from TerraSAR-X are used for validation.
3：List of Experimental Equipment and Materials:
TerraSAR-X satellite data is utilized.
4：Experimental Procedures and Operational Workflow:
The process includes echo isolation, motion compensation through range alignment and phase correction, and ISAR processing to achieve accurate focusing.
5：Data Analysis Methods:
The method employs minimum information entropy criterion for range alignment and phase gradient autofocus method for phase compensation.
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