Title :
Conservative Polarimetric Scatterers and Their Role in Incorrect Extensions of the Cameron Decomposition
Author :
Cameron, William L. ; Rais, Houra
Author_Institution :
Naval Surface Warfare Center, Dahlgren, VA
Abstract :
The properties of conservative symmetric polarimetric scatterer scattering matrices are examined. It is shown that the unambiguous rotation angle for "conservative" symmetric polarimetric scatterers is the interval (-pi/4,+pi/4] as compared with (-pi/2,+pi/2] for nonconservative symmetric scatterers. Errors relating to the Cameron decomposition, which are recently introduced into the literature, are discussed. It is demonstrated that these errors arise from a faulty symmetric scatterer scattering matrix distance measure. This, in turn, leads to an improper mapping of the symmetric scatterer unit disk to a hemisphere. The correct mapping of the symmetric scatterer unit disk to the symmetric scatterer unit sphere is described
Keywords :
S-matrix theory; geophysical techniques; radar polarimetry; remote sensing by radar; synthetic aperture radar; Cameron decomposition; conservative symmetric polarimetric scatterer scattering matrices; symmetric scatterer scattering matrix distance; symmetric scatterer unit disk; symmetric scatterer unit sphere; Marine vehicles; Matrix decomposition; Military aircraft; Oceans; Pixel; Polarization; Radar scattering; Sea measurements; Symmetric matrices; Synthetic aperture radar; Coherent decomposition, conservative, inverse synthetic aperture radar (ISAR), polarimetry, polarization, symmetric scatterer, synthetic aperture radar (SAR);
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.2006.879115