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A novel azimuth velocity estimation method is proposed based on the multiple azimuth squint angles (MASA) imaging mode, acquiring sequential synthetic aperture radar images with different squint angles and time lags. The MASA mode acquisition geometry is given first, and the effect of target motion on azimuth offset and slant range offset is discussed in detail. Then, the azimuth velocity estimation...
In this paper, a novel spaceborne SAR imaging mode is proposed. In this mode, sensor illuminates the scene with different azimuth squint angles and obtains a series of sequential images. According to the working mechanism of the mode, the geometry model is built first. Based on the geometry model, the characteristics of signal are analyzed in detail, which reveals principle of velocity estimation...
In synthetic aperture radar (SAR) images, moving objects appear defocusing. Traditional azimuth velocity estimation methods ignore the displacement error caused by defocusing, which lead to the pixel offset measurement error among sequential images. In order to correct this error, a velocity measurement approach by moving target refocusing is presented in this paper. A novel azimuth multi-angle spaceborne...
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