SPEED-UP OF NEAR-FIELD PHYSICAL OPTICS SCATTERING CALCULATIONS BY USE OF THE SAMPLING THEOREM
SPEED-UP OF NEAR-FIELD PHYSICAL OPTICS SCATTERING CALCULATIONS BY USE OF THE SAMPLING THEOREM
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DOI：
10.1109/20.312607
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发表时间：
1994-09-01
影响因子：
2.1
通讯作者：
IMBRIALE, WA
中科院分区：
文献类型：
--
作者：
CRAMER, PW;IMBRIALE, WA
在NASA深空网络(DSN)34米Ka波段波束波导天线上进行物理光学散射计算，在Cray Y-MP2计算机上需要大约12个小时的CPU时间--从资源利用的角度来看，这是过高的。计算是一次两面镜子完成的。采样定理用于减少通过在第一表面上执行物理光学积分而获得的第二表面上的点数。通过内插得到后续物理光学积分所需的点数。对于典型的散射对，获得了2到4个数量级的时间改进。
Physical optics scattering calculations performed on the NASA Deep Space Network (DSN) 34-meter beam-waveguide antennas at Ka-band requires approximately 12 hours CPU time on a Cray Y-MP2 computer - excessive in terms of resource utilization. The calculations are done two mirrors at a time. The sampling theorem is used to reduce the number of points on the second surface obtained by performing a physical optics integration over the first surface. The number of points required by subsequent physical optics integrations is obtained by interpolation. Time improvements on the order of 2 to 4 were obtained for typical scattering pairs.