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• W3208394433 startingPage "1632" @default.
• W3208394433 abstract "Imaging position shift based on the multiple azimuth squint angles (MASA) mode is effective for target azimuth velocity estimation, whereas accuracy is low when target range velocity is high. In this paper, the estimation problem for both target azimuth and range velocities is considered based on the multi-channels MASA (MC-MASA) mode. Firstly, the acquisition geometry of MC-MASA mode and Doppler characteristics of a moving target are analyzed in detail, especially in squint mode. Then, for better moving target estimation, the stationary background clutter is removed using the displacement phase center antenna (DPCA) technique, and the failure in range velocity estimation with sequential SAR images is also discussed. Furthermore, a modified along-track interferometry (ATI) is proposed to preliminarily reconstruct the azimuth-and-range velocity map based on the MC-MASA mode. Since the velocity estimation accuracy is dependent on squint angle and signal-to-clutter ratio (SCR), the circumstances are divided into three cases with different iteration estimation strategies, which could expand the scene application scope of velocity estimation and achieve a high estimation accuracy along both azimuth and range directions. Finally, the performance of the proposed method is demonstrated by experimental results." @default.
• W3208394433 created "2021-11-08" @default.
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• W3208394433 date "2021-04-21" @default.
• W3208394433 modified "2023-09-24" @default.
• W3208394433 title "A Moving Target Velocity Estimation Method Based on the MC-MASA SAR Mode" @default.
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• W3208394433 doi "https://doi.org/10.3390/rs13091632" @default.
• W3208394433 hasPublicationYear "2021" @default.
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