POLARIMETRIC RADAR BACKSCATTERING FROM RECIPROCAL RANDOM TARGETS

被引：62
作者：
TRAGL, K
机构：
[1] Institute for Radio Frequency Technolugy, German Aerospace Research Establishment DLR
来源：
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 1990年 / 28卷 / 05期
关键词：
D O I：
10.1109/36.58973
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Radar backscattering from reciprocal random targets is studied, employing a covariance matrix approach. Polarization signa-tnres for backscattered power and correlation observables are derived. Optimal polarizations for the power retnrn in two orthogonally polarized radar channels can be determined. Polarizations which extremize mean copolar power can be proved to rednce the correlation of the backscattered wave components exactly to zero. In the case of cross-polar optimal polarizations, a particular correlation diference rather than individual interchannel correlations tends to zero. The ntilization of these necessary conditions for the power extrema, furthermore, allows the introduction of an efcient numerical algorithm to compnte optimal plarization states for a given target covariance matrix. The presented polarimetric concept is demonstrated to generalize the well-established theory of characteristic polarizations. Analysis of chaf radar data, fnally, illustrates the efciency of the outlined approach. © 1990 IEEE
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页码：856 / 864
页数：9
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