A Novel Trajectory Extraction Method for High-Speed Weak Targets Based on High-Temporal Spaceborne SAR

The advent of high-temporal technology enables spaceborne synthetic aperture radar (SAR) to capture sequential images at a high-frame-rate. By leveraging the extensive temporal information of these images, it becomes feasible to detect high-speed targets. This paper introduces a novel method for extracting the trajectories of high-speed weak targets using the kernel functions and the Hough transform. The proposed method capitalizes on the regular perturbations observed in high-speed targets within sequential images to extract trajectories effectively. Simulation experiments conducted to assess the performance of this method demonstrate its ability to accurately trace high-speed target movements, even under low signal-to-noise ratio (SNR) conditions.