The influence of system parameters on multibaseline InSAR for layover solution

The Multi-baseline synthetic aperture radar interferometry (InSAR) is capable of solving layover phenomena because of its resolving capability along the elevation dimension. Using baseline diversity of a multi-baseline InSAR system to overcome layover is essentially a matter of spectral estimation problem. The spectrum´s period and the estimation resolution are influenced by the InSAR system parameters. This paper presents a thorough analysis of the influence of system parameters on the unambiguous height difference and the resolution of height retrieval of layover scenarios. The largest unambiguous height difference is derived and it is related to the baseline number and length. The resolution of height retrieval is determined by the signal-to-noise ratio, baseline number and multilook number. At the end, some useful advices on designing multi-baseline InSAR system parameters are presented.