Independent Reproduction Attempt of SAR Doppler Tomography for Subsurface Imaging of the Great Pyramid of Giza

We present, to our knowledge, the first independent reproduction attempt of the SAR Doppler Tomography method described by Biondi & Malanga (2022) for imaging subsurface structures using satellite radar. Through first-principles analysis of the method's baseline geometry and empirical testing on three independent datasets — Giza (Egypt), Vesuvius (Italy), and Gran Sasso (Italy) — we demonstrate that single-pass Doppler sub-aperture decomposition produces perpendicular baselines of approximately 618 mm, yielding an elevation resolution of ~285 m. This is insufficient to resolve the pyramid's internal chambers, including the King's Chamber at 43 m (6.6× coarser than the target), and the deep claims (600 m to 6 km) are unsupported by both geometry and electromagnetic penetration physics. A 240-experiment parameter sweep over the Giza plateau and an adjacent desert control site finds no evidence of target-specific subsurface discrimination (mean SNR difference: -0.021 ± 0.043), consistent with the geometric limitation. We note that multi-pass interferometric SAR tomography, using real orbital baselines from repeat satellite passes, may be capable of detecting shallow structures within ~60 m of the surface, including known pyramid internal chambers. This established technique, however, differs fundamentally from the single-pass method described in the published literature.