Normalized cross section (left) and the associated exponent n of the power functions (right) for the inbound branch of 67P/C-G, 81P/Wild 2, and 103P/Hartley 2 (from top to bottom). The dust layer is built from 0.1 mm dust particles. The solid and dashed lines represent Models A and B with different obliquities and arguments (obliquity = 60°, argument = 90°; obliquity = 80°, argument = 10°; obliquity = 60°, argument = 60°; obliquity and argument = real value for real comets), respectively. The black lines correspond to the real obliquities and arguments listed in Table 1.