In performing the LMOM with rooftop basis, the Gaussian rough surface is divided into 20 segments in each parametric direction of u and v.
The comparisons of the simulating time and memory requirements by the HMOM, the LMOM with rooftop or RWG basis for the same surface realization is also listed in Table 2, where H and V indicate the polarizations of the incident wave, respectively.
From Table 2, it is readily found that the HMOM spends less time to solve this scattering problem than the LMOM with rooftop basis.
The validity of this new technique is exhibited by comparing to the LMOM with RWG or rooftop basis.