Polarimetric Differential SAR Interferometry: First Results With Ground-Based Measurements

Polarimetric Optimization of Temporal Sublook Coherence for DInSAR Applications

“…As shown later, due to the parallelism between the coherence estimator and the TSC approach, it is possible to extend this method to work with the Best [5], SOM [9], and ESM [10] polarimetric optimization methods.…”

“…The objective is to improve the TSC performance in terms of both phase quality and pixels' density. In this framework, the polarimetric optimization methods referred to as Best [5], SubOptimum Scattering Mechanism (SOM) [9], and Equal Scattering Mechanism (ESM) [10] are adapted to work with the TSC approach.…”

A New Polarimetric Persistent Scatterer Interferometry Method Using Temporal Coherence Optimization

“…The computation time depends on the defined step in the search spaces; larger steps decrease the computation time, although they could lead to convergence on local optima instead of global ones. Optimizing the temporal coherence using other existing optimization methods, e.g., Union, in which the optimum channel is selected from a polarimetric channel with limited availability [21], may work with a lower computational cost, but the solutions are suboptimal. It should be mentioned that PolStaMPS can be applied over areas larger than the case study in this research, and the computation cost increases approximately linearly with the number of pixels of the scene.…”

“…As density and quality of PS pixels are important factors in PSI algorithms, the concept of polarimetric optimization in the PSI algorithms was proposed in [21] and [22] with zero-baseline ground-based SAR (GB-SAR) data, to improve the number of reliable pixel candidates. In [21], the simplest coherence optimization approach is performed based on the selection of the polarimetric channel with the highest average coherence value.…”

“…In [21], the simplest coherence optimization approach is performed based on the selection of the polarimetric channel with the highest average coherence value. A polarimetric PSI approach, known as exhaustive search polarimetric optimization (ESPO), using spaceborne data set was presented first by Navarro-Sanchez et al [23].…”