| 摘要: |
| 针对空间卫星目标的雷达散射截面（RCS）预估问题，提出了一种基于Kd-tree射线追踪法的
改进物理光学（PO）方
法，实现了对具有较强耦合结构的卫星目标电磁特性计算。基于卫星目标的三维面元模型，
建
立了其对应的Kd-tree空间分割描述结构，将其用于射线追踪，结合PO方法就可以得到给定
模型的RCS预估值。数值计算结果表明，改进方法和MoM方法相比，具有相同计算精度但计算
效率高得多，相比单纯PO方法，改进方法也更接近测量值。 |
| 关键词: 卫星目标 RCS预估 射线追踪 物理光学法 Kd-tree方法 |
| DOI： |
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| 基金项目: |
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| A modified satellite RCS prediction method based on ray tracing combined with Kd-tree descriptions |
| ZHAO Ge,ZHANG Jun,HU Jie-min |
| () |
| Abstract: |
| A modified Physical Optics(PO) method is presented to predict the radar cross se
ction(RCS)
of space targets such as satellites which have relatively complicated and coupl
ed structures. The Kd-tree space segmentation description structure is firstly e
stablished based on the 3D patch model of target satellite. And it is used to im
plement ray tracing, which is combined with PO method to figure out
the RCS prediction. Numerical calculation shows that the modified approach has
the same accuracy with Method of Moment(MoM) but much shorter time consumption.
And the RCS obtained by new
method approximates the measured one compared with pure PO method. |
| Key words: satellite target RCS prediction ray tracking physical optics method Kd-tree m
ethod |
