Evaluation of Van Khan Tooril’s castle, an archaeological site in Mongolia, by Ground Penetrating Radar
| Autor: | Tseedulam Khuut, Motoyuki Sato |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Exploration Geophysics. 40:69-76 |
| ISSN: | 1834-7533 0812-3985 |
| Popis: | WereportanimplementationoftheGroundPenetratingRadar(GPR)surveyatasitethatcorrespondstoaruined castle. The objective of the survey was to characterise buried archaeological structures such as walls and tiles in Van Khan Tooril'sRuin,Mongolia,by2Dand3DGPRtechniques.GPRdatasetswereacquiredinanarea10mby9m,with10cmline spacing.Twodatasetswerecollected,usingGPRwith500MHzand800MHzfrequencyantennas.Inthispaper,wereportthe use of instantaneous parameters to detect archaeological targets such as tile, brick, and masonry by polarimetric GPR. Radar polarimetry is an advanced technology for extraction of target scattering characteristics. It gives us much more information about the size, shape, orientation, and surface condition of radar targets. Wefocusedourinterpretationonthestrongestreflections.Theimageisenhancedbytheuseofinstantaneousparameters. Judging by the shape and the width of the reflections, it is clear that moderate to high intensity response in instantaneous amplitude corresponds to brick and tiles. The instantaneous phase map gave information about the location of the targets, which appeared as discontinuities in the signal. In order to increase our ability to interpret these archaeological targets, we comparedtheGPRdatasetsacquiredintwoorthogonalsurveydirections.Agoodcorrelationisobservedforthealignmentsof reflections when we compare the two datasets. However, more reflections appear in the north-south survey direction than in the west-east direction. This is due to the electric field orientation, which is in the horizontal plane for north-south survey directions and the horizontally polarised component of the backscattered high energy is recorded. |
| Databáze: | OpenAIRE |
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