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Quantitative parameters characterizing the sea ice\udsurface topography are needed in geophysical investigations\udsuch as studies on atmosphere–ice interactions or sea ice mechanics.\udRecently, the use of space-borne single-pass interferometric\udsynthetic aperture radar (InSAR) for retrieving the\udice surface topography has attracted notice among geophysicists.\udIn this paper the potential of InSAR measurements is\udexamined for several satellite configurations and radar frequencies,\udconsidering statistics of heights and widths of ice\udridges as well as possible magnitudes of ice drift. It is shown\udthat, theoretically, surface height variations can be retrieved\udwith relative errors < 0.5 m. In practice, however, the sea ice\uddrift and open water leads may contribute significantly to the\udmeasured interferometric phase. Another essential factor is\udthe dependence of the achievable interferometric baseline on\udthe satellite orbit configurations. Possibilities to assess the influence\udof different factors on the measurement accuracy are\uddemonstrated: signal-to-noise ratio, presence of a snow layer,\udand the penetration depth into the ice. Practical examples of\udsea surface height retrievals from bistatic SAR images collected\udduring the TanDEM-X Science Phase are presented

Sea ice local surface topography from single-pass satellite InSAR measurements: a feasibility study