Download e-book for kindle: A New Target Detector Based on Geometrical Perturbation by Armando Marino

By Armando Marino

ISBN-10: 3642271626

ISBN-13: 9783642271625

This thesis offers a groundbraking technique for the radar foreign group. The detection process brought, particularly perturbation research, is completey novel exhibiting a amazing strength of pondering outdoors the field. Perturbation research is ready to push ahead the functionality limits of present algorithms, permitting the detection of pursuits smaller than the answer telephone and hugely embedded in muddle. The method itself is striking flexibe and has already been utilized in different huge initiatives, funded through the ESA (European house Agency): M-POL for maritime surveillance, and DRAGON-2 for land type with specific cognizance to forests. This publication is a superbly organised piece of labor the place each element and standpoint is considered with a view to offer a finished imaginative and prescient of the issues and solutions.

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Extra resources for A New Target Detector Based on Geometrical Perturbation Filters for Polarimetric Synthetic Aperture Radar (POL-SAR)

Sample text

1 presents the values of q for frequently utilised bases. 3 Stokes Vectors In the previous section, the treatment of wave polarimetry assumes an implicit hypothesis: stationarity in time. Obviously, the electric field is not stationary since it keeps oscillating, tracing the polarisation ellipse. e. the same in time). 2 Wave Polarimetry 33 where the polarisation ellipse is a function of time and changes shape. The aim of this section is to introduce the mathematical tools required to describe a nonstationary wave polarisation (Beckmann 1968).

It can be calculated with the span of the scattering matrix. 2 Scattering Features Vectors The aim of this section is to provide a geometrical representation of the target based on a vector rather than a matrix. The reason is that with vectors it is often easier to handle algebraic manipulations (Cloude 1987; Ulaby and Elachi 1990). A scattering features vector was introduced: 1 k4 ¼ Tracef½SŠWg ¼ ½k1 ; k2 ; k3 ; k4 ŠT : 2 ð3:29Þ where W is a complete set of 2 9 2 complex basis matrices under a Hermitian inner product.

2:34Þ is called the scattering (or Sinclair) matrix. With the scattering matrix any stationary target illuminated by a wave with stationary polarisation can be completely characterised (Kennaugh and Sloan 1952). The hypothesis of stationarity seems to be unavoidable; however in the next section we will see that in the case of nonstationary processes we can still characterise a target exploiting its statistics. When the scattering matrix is completely acquired in one single flight pass of the platform, the system is defined as quad polarimetric.

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A New Target Detector Based on Geometrical Perturbation Filters for Polarimetric Synthetic Aperture Radar (POL-SAR) by Armando Marino

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