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�������պ����ѧѧ�� 2009, Vol. 35 Issue (4) :453-456    DOI:
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Electromagnetic occultation algorithm based on facets grouping and optimization
Ji Jinzu, Liu Zhanhe*
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ �������ѧ�����㸴��Ŀ����״�ɢ�����(RCS,Radar Cross Section)ʱ,ͨ����Ԫ�ص�Ų����䷽����ص���ϵ�;������ж���Ԫ֮����ڵ�.����ԪͶӰ�����Ų����䷽��ֱ��ƽ���Ͻ��з���,ʹͬ�����Ԫ�������.�ڼ�����ֻ���ͬ�����Ԫ�ж��ڵ���ϵ,������������Ԫ�������ڵ��ж�,�Ӷ���ʡ����ʱ��,���Է���������Ż�,ʹ����ʱ������.��������,������Ԫ������ڵ��жϷ�������,�ܹ������߼���Ч��.
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Abstract�� When calculating complex target-s radar cross section(RCS) with physical optics(PO) method, the facets shadowing relationship was judged through overlapping and depth-of-view of facets along the incident wave direction. The facets were projected on the plane that was perpendicular with the incident wave direction and then grouped to several groups to make sure that the distance of facets in the same group were close. Only the facets in the same group needed to be judged whether they are shadowed or not instead of making the judgement between all of the facets thus the calculating time was saved. The grouping size was optimized to make the the calculating time be the least. The calculating examples showed that this method is feasible and can make the calculating more efficient.
Keywords�� physical optics(PO)   occultation   facets   grouping   radar cross section(RCS)     
Received 2008-04-23;
About author: ������(1982-),��,�����Ӱ���,��ʿ��,jijinzu@ase.buaa.edu.cn.
������, ��ս��.������Ԫ����ĵ���ڵ��㷨�����Ż�[J]  �������պ����ѧѧ��, 2009,V35(4): 453-456
Ji Jinzu, Liu Zhanhe.Electromagnetic occultation algorithm based on facets grouping and optimization[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2009,V35(4): 453-456
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