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• W4379117029 abstract "For air moving target indication in nadir region, due to the fact that a spaceborne radar beam can illuminate the top of fuselage, the target radar cross section is usually high, which is beneficial for the detection of a low-observable target. However, due to the short slant range, specular reflection effect, and relatively low radar ground resolution, the power of clutter component from nadir region is comparatively high, leading to the insufficient clutter suppression and the degradation of target detection performance. Fortunately, when an air moving target is adequately high, the target echo is able to be separated from the main clutter echoes due to a shorter time delay, making it possible to be only mixed with low-power ambiguous clutter echoes. Based on these considerations, this paper analyzes the performance of air moving target indication in nadir region for a spaceborne surveillance radar system. It analyzes the target minimum detectable velocities with different target heights and beam center elevation angles. Also, an effective sample selection method based on adaptive range segmentation is proposed to solve the power heterogeneity issue between the main clutter area and the range ambiguous clutter area. As a conclusion, the larger the elevation angle of an air moving target is, the higher the minimum target detectable height is." @default.
• W4379117029 created "2023-06-03" @default.
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• W4379117029 date "2023-01-01" @default.
• W4379117029 modified "2023-10-17" @default.
• W4379117029 title "Air Moving Target Indication in Nadir Region for Spaceborne Surveillance Radar Systems" @default.
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• W4379117029 doi "https://doi.org/10.1109/lgrs.2023.3282411" @default.
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