Dual-Cross-Polarized GPR Measurement Method for Detection and Orientation Estimation of Shallowly Buried Elongated Object

Detecting a shallowly buried and elongated object estimating its orientation using commonly adopted co-polarized GPR system is challenging due to the presence of strong ground clutter that masks target reflection. A cross-polarized configuration can be used suppress reveal reflection, but it suffers from inconsistent detection capability which significantly varies with different orientations. To address this issue, we propose dual-cross-polarized (DCPD) method utilizes two antennas special arrangement detect object. The signals reflected by collected are combined in rotationally invariant manner ensure both effective suppression consistent irrespective orientation. In addition, present estimation (DCPOE) algorithm estimate data. proposed DCPOE less affected environmental noise performs robust accurate azimuth angle estimation. effectiveness techniques their advantages over existing have been demonstrated experimental Comparison results show maximum average errors 22.3{\deg} 10.9{\deg} for Alford rotation algorithm, while those 4.9{\deg} 1.8{\deg} cases. unified framework facilitate investigation mapping targets.