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.
Simone Pomposi (Tue,) studied this question.