The scattered power in a given scattering geometry depends in general on the incident polarization, and particular ones which yield the maximum or the minimum scattered powers at each field point in space are called optimal polarizations. The optimal polarizations for a scatterer, therefore, are point functions of the position in space. The theory of optimal polarization, however, includes in addition a set of incident polarizations for “cross-polarization nulls” and “co-polarization nulls” in backscatter. These terminologies will be defined later. Throughout the chapter, both the incident and scattered waves are assumed to be completely polarized.
KeywordsMicrowave Radar Assure Tral Remote Sensing
Unable to display preview. Download preview PDF.
- 4. 1A. Albert, Regression and Moore-Penrose pseudoinverse, Academic Press, New York, NY, 1972. See pp. 38–42 for the singular value decomposition.Google Scholar
- 4. 2K. E. Atkinson, Introduction to Numerical Analysis, John-Wiley & Sons, Inc., New York, NY, 1978.Google Scholar
- 4. 3
- 4. 4R. Collin and F. Zucker, Antenna Theory Part 1, McGraw-Hill, New York, NY, 1969.Google Scholar
- 4. 5
- 4. 6C. Graves, Radar polarization power scattering matrix, Proc. IRE, 1956; pp. 248–252.Google Scholar
- 4. 7R. Huynen, Phenomenological theory of radar targets in Electromagnetic Scattering, ed. P. L. Usleghi, Academic Press, New York, NY, 1978.Google Scholar
- 4. 8E. Kennaugh, The effects of polarization on radar echo charac- teristics, Ohio State University Report No. 389–12, 1952.Google Scholar
- 4. 9C. Lanczos, Linear Differential Operators, Van Nostrand Co., New York, NY, 1961. See pp. 115–118 for decomposition of real rectangular matrices.Google Scholar
- 4. 10J. A. Kong, L. Tsang and R. Shin, Theory of Microwave Remote Sensing, Interscience Publishers, New York, NY, 1985. See pp. 133–135 for the reciprocity relation.Google Scholar