Conceptual Study of Tri-beam Spacebrone SAR

Multi-temporal synthetic aperture radar interferometry (MT-InSAR) is used for many application in earth observations. Conventional SAR missions with single beam only detect deformation along the line of sight and relative elevation due to the undetermined model of phase wrapping. In this paper, a tri-beam spaceborne SAR mission is introduced to overcome the limitation of the relative measurements. Using multi-view measurements, it is possible to detect 3-D deformation and derive 3-D surface model from a single satellite platform. A multi-dimensional coherent scattering model is used to simulate the multi-temporal SAR data with different viewing angles. The results of this study indicate that the tri-beam SAR is able to measure 3-D deformation and reconstruct 3-D surface model without ground control point.