Comparison with Shape Measurements

In cylindrical coordinates, our dimensional result is:

LaCombe et al. [1995] fit SCN tip shapes using:

For P » 0.004, they find Q(f) » –0.004 cos 4f:

Comparison of shapes gives e » –0.008, and evaluating S(2) for P = 0.004 and e = -0.008 then gives