Umashankar and Taflove's square conducting cylinder, k0 A = 1, TM, normal incidence
|J_z| / |H_x^i| at the middle of the lit, side and shadowed faces
FD-TD, 20 cells a side (62.8 a wavelength):    lit 1.7316, side 0.7644, shadowed 0.1689
FD-TD, 40 cells a side:                        lit 1.7351, side 0.7670, shadowed 0.1699
moment method, 100 points a side:              lit 1.7371, side 0.7688, shadowed 0.1706
moment method, 20 points a side (their 80):    lit 1.7382, side 0.7705, shadowed 0.1710
the figure's curve on the shadowed face: 0.207, 21 % above the moment method's
  FD-TD 20: middle of the lit face       1.731596   paper 1.75       ± 4.5e-2    ok
  FD-TD 20: middle of a side face        0.764418   paper 0.785      ± 2.6e-2    ok
  FD-TD 40: lit face                     1.735135   Eq. 8a 1.737104   ± 1.7e-2   ok
  FD-TD 40: side face                    0.767014   Eq. 8a 0.768780   ± 7.7e-3   ok
  FD-TD 40: shadowed face                0.169924   Eq. 8a 0.170611   ± 1.7e-3   ok
all 5 within tolerance of the paper
