Along Track Slope Compensation In A SIMO Formation

Compact single-input-multiple-output (SIMO) formations are a promising option for performance improvement in future Synthetic Aperture Radar (SAR) missions. A high-resolution unambiguous imaging is obtained by utilizing several satellites with small antennas. The across-track baseline between the satellites poses a significant issue for known signal reconstruction algorithms due to the dependency on the topography, which may vary along-track. Proposed here is a method to compensate for height variations along the azimuth direction using a simplified but powerful 1-D model. A theoretical derivation of a forward model is provided, and performance analysis in terms of signal to noise is demonstrated.