4 September 1998 Use of polarimetry to reduce the impact of clutter in the detection of mines buried in irregular stratified media
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Abstract
Detection of mines buried in irregular stratified media is significantly complicated by the presence of signal clutter due to scattering from the rough interfaces of the layered structure. Full wave solutions have been derived for the electromagnetic fields scattered by the two rough surfaces in a realistic physical model of the three media environment of the mines. They account for five different scattering mechanisms that the waves undergo, assuming that both the transmitter and receiver are above the uppermost interface of the irregular media. Two scattering mechanisms are associated with reflection from above and below the upper interface and two are associated with transmission across the upper interface, the fifth is associated with reflection from above the lower interface. In view of the fact that in general the two rough interfaces are characterized by independent random rough surface heights (except where the thickness of the intermediate medium vanishes) the rough surface height joint probability density functions are characterized by a family of probability density functions associated with the gamma functions. Multiple bounces between the two interfaces are accounted for in the analysis. The elements of the incoherent Mueller matrix (that relates the scattered fields to incident Stokes vectors) are obtained from the expressions for the scattered fields. From the simulated data it is possible to determine the optimal polarizations and the incident and scatter angles of the waves as well as the wavelength, for purposes of suppressing the impact of the clutter on the detection of buried objects.
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Ezekiel Bahar, Ezekiel Bahar, "Use of polarimetry to reduce the impact of clutter in the detection of mines buried in irregular stratified media", Proc. SPIE 3392, Detection and Remediation Technologies for Mines and Minelike Targets III, (4 September 1998); doi: 10.1117/12.324242; https://doi.org/10.1117/12.324242
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