Full-resolution adaptive differential tomography

Recently, a new interferometric mode crossing the differential SAR interferometry and multibaseline SAR tomography concepts, termed differential SAR tomography, has been proposed. Its potentials, coming from the joint elevation-velocity resolution capability of multiple scatterers, have been demonstrated both theoretically and with real data. Processing is cast in a two-dimensional baseline-time spectral analysis framework, with sparse sampling. The use of adaptive two-dimensional spectral estimation has been shown to allow joint baseline-time processing with reduced sidelobes and enhanced elevation-velocity resolution. However, this method requires coherent multilooking processing, thus does not produce a range-azimuth full resolution differential tomographic product. In this work a new single-look adaptive differential tomographic processor is presented, to allow range-azimuth full resolution together with the good elevation-velocity sidelobe and resolution capabilities of adaptive processing. Simulated results are reported for different baseline-time acquisition patterns, both monostatic and multistatic, and different motion conditions of layover scatterers.