Subsurface fine structures survey by GPR B-scan image based on signal subspace method

A novel signal subspace method using Ground Penetrating Radar (GPR) B-scan imaging successfully identified subsurface fine structures, including fractures leading to water intrusion, at the Dazu Rock Carvings UNESCO World Heritage Site. This approach effectively discriminates between geological features by leveraging sparse representation and fracture signatures, overcoming challenges posed by interferences, clutters, and noise in radar signals. The method was validated with field survey data, demonstrating its potential for precise subsurface analysis in heritage conservation. By addressing energy attenuation and random noise during signal propagation, this technique offers a robust tool for detecting subtle geological anomalies that could impact cultural sites.

Sun, T., Zhang, Z. C., Song, B., Tang, X. J., & Liu, S. B. (2016). Subsurface fine structures survey by GPR B-scan image based on signal subspace method. 2016 16th International Conference on Ground Penetrating Radar (GPR), 1–5. https://doi.org/10.1109/icgpr.2016.7572593