The new Tandem Dual-Antenna Spaceborne Synthetic Aperture Radar (SAR) Interferometry (TDA-InSAR) system, addresses the limitations of current spaceborne Synthetic Aperture Radar (SAR) systems by providing a more reliable and efficient method for 3D surface mapping. The system’s innovative design allows for single-pass acquisitions, significantly reducing the time required for data collection and enhancing the precision of 3D reconstructions in various terrains, including built-up areas and vegetation canopies.