Evaluation of Trihedral Corner Reflector for SAR Polarimetric Calibration

Shunichi KUSANO  Motoyuki SATO  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E92-C   No.1   pp.112-115
Publication Date: 2009/01/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E92.C.112
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on Recent Progress in Electromagnetic Theory and its Application)
Category: 
Keyword: 
polarimetric calibration,  trihedral corner reflector,  method of moment,  

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Summary: 
A trihedral corner reflector is often used for SAR polarimetric calibration. However, the scattering property of the reflector used for the calibration may not be correct if the high frequency approximation is not satisfied or if an incident angle deviates from the symmetric axis of the reflector. In order to know the conditions for precise SAR polarimetric calibration, we evaluated the polarimetric response of the reflector by a numerical simulation using the method of moment (MoM). It is found that allowable incident angle deviation is 5 degree to azimuth direction and 4 degree to elevation direction for precise SAR polarimetric calibration when the size of the reflector is 7.5 times larger than the wavelength of an incident wave.