Permanent Scatterers in Repeat-Pass Airborne VHF Radar Sounder for Layer-Velocity Estimation

Englacial layer velocity can provide insights on the vertical-velocity structure of ice sheets. We present a repeat-pass interferometric approach that allows estimation vertical englacial using radar sounder data. In contrast to ground-based sensors, airborne data potentially be used estimate continental scale. When merged with horizontal surface and numerical models, support 3-D analysis flow structure. Our aim is proof-of-concept demonstration that, similar side-looking synthetic aperture for imaging, subwavelength displacement radio-stratigraphic layers. To achieve this, we use phase magnitude acquired repeatedly over same region interest. After extraction crossing points, two acquisitions are finely registered. Then, compute layers (which shown behave as PSs in nadir sounding geometry), profile. results East Antarctica from high-capability (HiCARS) system. show scenarios demonstrate feasibility, limitations, requirements this approach.