Multichannel synthetic aperture radar (SAR) is a significant breakthrough to the inherent limitation between high-resolution and wide-swath (HRWS) compared with conventional SAR. Moving target indication (MTI) is an important application of spaceborne HRWS SAR systems. In contrast to previous studies of SAR MTI. the HRWS SAR mainly faces the problem of under-sampled data of each channel. https://stnicksknives.shop/product-category/mini-presidio-ii-5750/