tailieunhanh - Radar technolog Part 5

Tham khảo tài liệu 'radar technolog part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 6 Ground Penetrating Radar Subsurface Imaging of Buried Objects Francesco Soldovieri1 and Raffaele Solimene2 institute for Electromagnetic Sensing of the Environment National Research Council 2Department of Information Engineering Second University of Naples Italy 1. Introduction Ground Penetrating Radar GPR is a well assessed diagnostic instrumentation that finds application in a very large range of sectors where the aim is of achieving information about the presence the position and the morphological properties of targets embedded in opaque media is c crucial task. Therefore it is of interest in many fields which range from civil engineering diagnostics Hugenschmidt Kalogeropulos 2009 Soldovieri et al. 2006 to archaeological prospecting Conyers Goodman 1997 Piro et al. 2003 Orlando Soldovieri 2008 to cultural heritage management to geophysics only to quote a few examples. Besides these classical fields of application GPR methodology technology is arising interest in new fields related to the security framework such as through-wall imaging Baranoski 2008 Ahmad et al. 2003 Solimene et al. 2009 tunnel and underground facility detection Lo Monte et al. 2009 borders surveillance. Another field of recent interest is concerned with the exploration of planets in particular satellite platform radars are just investigating the Marsis subsurface Watters et al. 2006 for the water search and other similar missions are under development for Lunar exploration. GPR is based on the same operating principles of classical radars Daniels 1996 . In fact it works by emitting an electromagnetic signal generally modulated pulse or Continuous Wave into the ground the electromagnetic wave propagates through the opaque medium and when it impinges on a non-homogeneity in the electromagnetic properties representative of the buried target a backscattered electromagnetic field arises. Such a backscattered field is then collected by the receiving antenna located at the air opaque medium .

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