> ## Content Index
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# Ground-Penetrating Radar
- URL: https://www.cascadepbs.org/movies/time-team-america-search-josiah-henson/extras/time-team-america-ground-penetrating-radar/
- Published: 2025-05-02T19:05:19.000Z
- Updated: 2025-06-07T23:07:58.000Z
- Description: Bryan Haley uses ground penetrating radar to reveal features underground without digging.
- Author: Cascade PBS Staff
- Tags: The Search for Josiah Henson, #ZZZ_Show_7a173a56-dacd-43d9-8960-5a4f51db7cc2, #hide, #v1.3, #ZZZ_Extra_0a8b52e1-aa3c-4a2f-b810-bf0635ace42f, #movie-extra

Archaeological geophysist Bryan Haley uses ground penetrating radar to reveal features underground without digging. He explains why laying out a perfectly square grid is an important part of his method, and he shows off how his high tech gear can help him create a subterranean map of the site.