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New GPRTools for Archaeologists
by Tom Waschura
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Editorial on GPR and geophysical archaeology in 2026
by Lawrence B. Conyers
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Ground-penetrating Radar Studies at the HAMMER Test Facility, Richland, Washington
The HAMMER geophysical test bed in Richland, Washington provides a facility to compare ground-penetrating radar (GPR) reflection images to known archaeological features in the ground. Simulated buried features including stone cairns and rings, burials, trash middens, artifacts and other materials were buried at depths from 12-36 inches in sandy ground and then re-buried with the same material. Grids of GPR data were collected in dry and wet ground conditions, and the amplitude maps from each were compared to the known buried features using 900, 500 and 400 MHz frequency reflection maps and profiles.
