P-FFT Accelerated EFIE with a Novel Diagonal Perturbed ILUT Preconditioner for Electromagnetic Scattering by Conducting Objects in Half Space

Table 2

Condest, of different preconditioned linear systems equation (12) for 3D scattering example.

	ILUT	ILUTP5	MILU0	DP-ILUT
Almond		2.5	693,098	1,956,402
Open cavity	133	3.4	3.5	2.7
Aircraft model	1050	3.5	21.3	23.6
Tank model	1467	5.6	125	163