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Vehicle-mounted ground penetrating radar (GPR) is an effective and rapid tool to detect railway subgrade defects. However, the signal to noise ratio (SNR) of the raw GPR data on railway subgrade is much lower than that of other detection sites. The primary noises are caused by radar wave reflections from the rails and steel-concrete sleepers. However, the rail noise is always invariant since the rails...
Improving understanding of Arctic ecosystem functioning and parameterization of models that simulate freeze-thaw dynamics require advances in quantifying soil and snow properties. Due to the significant spatiotemporal variability of soil properties and the limited information provided by point-scale measurements (e.g., cores), geophysical methods hold potential for improving soil and permafrost characterization...
This paper presents a crosshole radar system and its model experiment for underground structure's defect detection. The system was built using a vector network analyzer (VNA), cylinder dipole antennas, and a radio frequency (RF) amplifier. The VNA enables the radar to work in a stepped frequency mode. The antenna, which has a carefully designed diameter of 32 mm, is compatible with most boreholes...
This study presents the findings of a GPR investigation at two archaeological sites in Vadnagar, India; Area 1: Gaon Tal near a Hindu Temple (23°47'19.57″N; 72°38'47.75″E) and Area 2: Baba No Tekdo locality II (23°47'30.53″N; 72°38'55.59″E). Area 1 was surveyed in two plots of dimensions 16m × 10m and 12m × 16m, and Area 2 in a single plot of size 40m × 36m. Total seventy-two profiles were taken using...
The authors of this article investigated several issues concerning the testing of GPR surveying and the development of data processing methods for assisting in solving criminal activities as performed by the Investigative Committee of the Russian Federation. The work of governmental agencies along with forensic science are deeply based on using GPRs for detecting caches, crypts, conduits and saps,...
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