RangeǶ  ( 0..<=90 )         (90..<=180)              ( >180)  *:mark for modified
   (r/t)   S                (r/t)   S              (r/t)   S
   5.00    0.5               5.0    0.50           2.80    0.50
   4.00    0.47t             4.0    0.49t          2.60    0.49t
   3.00    0.46t*            3.0    0.48t          2.40    0.48t
   2.00    0.455t            2.0    0.47t          2.20    0.46t
   1.80    0.45t             1.8    0.46t          2.00    0.44t
   1.50    0.44t             1.5    0.45t          1.80    0.42t
   1.00    0.42t             1.0    0.44t
   0.80    0.405t            0.8    0.43t
   0.60    0.385t            0.6    0.42t
   0.50    0.38t             0.5    0.41t
   0.40    0.37t             0.4    0.40t
   0.30    0.36t             0.3    0.38t
   0.20    0.33t             0.2    0.36t
   0.10    0.32t*            0.1    0.35t
