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Proceedings Paper

Estimation of ground surface topography and velocity model by SAR-GPR and its application to landmine detection
Author(s): Xuan Feng; Zheng-shu Zhou; Takao Kobayashi; Timofei G. Savelyev; Jun Fujiwara; Motoyuki Sato
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Paper Abstract

The height variation of ground surface and incorrect velocity will affect imaging processing of landmine. To eliminate these effects, ground surface topography and velocity model are needed. For effective detection of landmines, a stepped-frequency continuous-wave array antenna ground penetrating radar system, called SAR-GPR, was developed. Based on multi-offset common middle point (CMP) data acquired by SAR-GPR, we describe a velocity model estimation method using velocity spectrum technique. Also after pre-stack migration, the ground surface can be identified clearly. To compensate landmine imaging for the effect created by height variation, the ground surface displacement, a kind of static correction technique, is used based on the information of ground surface topography and velocity model. To solve the problem of incorrect velocity, we present a continuous variable root-mean-square velocity based on the velocity model. The velocity is used in normal moveout correction (NMO) to adjust the time delay of multi-offset data, and also applied to migration for reconstruction of landmine image. After the application of ground surface topography and velocity model to data processing, we could obtain good landmine images in experiment.

Paper Details

Date Published: 10 June 2005
PDF: 8 pages
Proc. SPIE 5794, Detection and Remediation Technologies for Mines and Minelike Targets X, (10 June 2005); doi: 10.1117/12.603235
Show Author Affiliations
Xuan Feng, Tohoku Univ. (Japan)
Jilin Univ. (China)
Zheng-shu Zhou, Tohoku Univ. (Japan)
Takao Kobayashi, Tohoku Univ. (Japan)
Japan Science and Technology Agency (Japan)
Timofei G. Savelyev, Tohoku Univ. (Japan)
Jun Fujiwara, Tokyo Gas Co. Ltd. (Japan)
Motoyuki Sato, Tohoku Univ. (Japan)


Published in SPIE Proceedings Vol. 5794:
Detection and Remediation Technologies for Mines and Minelike Targets X
Russell S. Harmon; J. Thomas Broach; John H. Holloway, Editor(s)

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