Boundary-induced phase locking and guided helical modes in SAR Doppler tomography of the Giza Plateau

This preprint investigates the physical interpretability of phase-based SAR Doppler tomographic products under conditions of structural non-invertibility and boundary-limited observability. Using publicly released polarimetric and non-polarimetric datasets from the Giza Plateau, the analysis focuses exclusively on boundary-supported phase and coherence invariants, deliberately avoiding volumetric reconstruction. The results reveal a globally coherent phase organization characterized by a single dominant longitudinal pitch, sustained phase coherence, and symmetry-selective phase locking, which are incompatible with interpretations based on independent subsurface structures. A minimal cylindrical guided-mode model is shown to provide a consistent and parsimonious description of the observed phase organization. This manuscript is released as a pre-review preprint. No claims of unique subsurface reconstruction are made.