The analysis of reliable ARC solution in the multi-temporal InSAR

In the multi-temporal InSAR technique, a deformation map is obtained by arc integration. Therefore, the reliability of an arc solution directly influences the precision of the final result. Many methods have been proposed to estimate arc parameters, but few have evaluated the arc quality. In this study, the influence of phase ambiguity is analyzed and two indicators are defined to identify the arcs with ambiguity. Subsequently, phase unwrapping is applied and bad arcs are removed according to other two indicators. In addition, the network is reconstructed based on a simple star network to link most points. Finally, the result obtained by this method is compared with the result by GAMMA software, which generally exhibit good agreement.