研究目的
Investigating the phase glint problem involved in interferometric synthetic aperture radar (InSAR) image processing, which refers to the multiple scatterer interference of a single pixel, and studying the distribution of interferometric phase in the case of double scatterer interference.
研究成果
The observed interferometric phase of phase glint is a chaotic value and varies with the complex scattering coefficient ratio (CSCR) between the elementary scatterers, which cannot reflect the real height of any elementary scatterer and may produce serious height estimating error. Simulation and real data experiment results verify the theoretical analysis.
研究不足
The study focuses on the phase glint problem caused by multiple scatterer interference of a single pixel in single-pass InSAR system. The impact of phase glint on height retrieval, especially for man-made targets, requires extra care to account for the effects of phase glint.
1：Experimental Design and Method Selection:
The study involves mathematical modeling and simulation to analyze the phase glint problem in InSAR image processing.
2：Sample Selection and Data Sources:
Simulation and real data from East China Research Institute of Electronic Engineering are used.
3：List of Experimental Equipment and Materials:
Parameters of InSAR system including carrier frequency, height of airplane, velocity of airplane, looking angle, range resolution, and azimuth resolution.
4：Experimental Procedures and Operational Workflow:
The study includes simulation experiments to validate the distribution characteristics of interferometric phase and real data experiments to demonstrate the impact of phase glint on man-made target height retrieval.
5：Data Analysis Methods:
The analysis involves deriving the detailed phase distribution characteristic of phase glint and presenting a demonstration about the impact of phase glint on classical InSAR image processing and man-made target height retrieval.
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