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| | 講演要旨(英文) | | Currently Ground Penetrating Radar ,GPR, used in archaeological prospection is based on 2D parallel line methodologies characterized by line spacing ranging from 0.25m to 1m ,common line separation is 0.5m, with 250MHz or 500MHz antennas and huge amount of interpolation used to fill in the data gaps. Such a 3D GPR surveys produce highly interpolated subsurface maps which do not exploit the full resolution of GPR. High resolution 3D-GPR images of the subsurface can be obtained by a quarter wavelength of grid spacing in all direction. Acquiring such a very huge and dense data using commercial GPR is not practical and data processing takes a very long time. Recently we use a new GPR system which is a combination between commercial GPR with a rotary laser positioning system developed by Miami University. In this paper we will show how the high density 3D-GPR data can improve the image quality and refined the subsurface archaeological structure resolution in Satiobaru burial mounds archaeological site. The GPR vertical cross-sections, horizontal depth slices and the data volume animation extracted from the full resolution 3D GPR reveal a lot of information about the past human activities most likely burial mounds. These structures can not be clearly detected from horizontal time slice created by the standard 2D GPR parallel line survey. |
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