SubSAR – A Scheme for the Discrimination Between Surface and Sub-Surface Features at Large Stand-Off Distances

摘要

We report on SubSAR, a new application of DInSAR for the discrimination between surface and sub-surface features,rnat large stand-off distances applicable to airborne and satellite measurements. This is in sharp contrast torncurrent techniques, where discrimination relies on close-in measurement of the scene, usually by scanning acrossrnthe surface with a ground-penetrating radar. Close-in schemes rely on an ability to spatially isolate vertically, thernsurface and sub-surface backscatter returns, such that range-layover severely limits practical stand-off distances.rnDInSAR phase has classically been used to provide sub-wavelength measurements of surface deformation. However,rnrecent studies have indicated that the phase signature can also be used as a proxy for soil moisture changes,rnand the SubSAR technique utilizes that relationship to distinguish between surface and buried features. It is proposedrnthe new scheme will have diverse applications in remote sensing, including soil moisture monitoring andrnhumanitarian demining.