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Alternate abstract:
Traditional optical remote sensing mainly collects surface geometric information and partial physical information, which is difficult to monitor their thickness and internal structural attribute information. PolInSAR (polarimetric SAR interferometry) characterized by the ability to penetrate the surface cover can record internal structures and physical properties, bringing opportunities to solve the above problem. Therefore, how to perform "penetration mapping" to the surface cover to fully collect the spatial geometry, internal structural properties and its dynamic change process have become a research hotspot. This article tries to define the connotation of "penetration mapping". Then the PolInSAR application progress of the natural surface cover of vegetation, ice and the desert are combed. Finally, we analyze and summarize the current problems and challenges faced by PolInSAR penetration mapping.
