getSTMid function

ST getSTMid(
  1. double a_,
  2. double b_
)

Implementation

ST getSTMid(double a_, double b_) {
  double S = 0.11516993 +
      1 / (7.44778970 + 4.15901240 * b_ + a_ * (-2.19557347 + 1.75198401 * b_ + a_ * (-2.13704948 - 10.02301043 * b_ + a_ * (-4.24894561 + 5.38770819 * b_ + 4.69891013 * a_))));

  double T = 0.11239642 +
      1 / (1.61320320 - 0.68124379 * b_ + a_ * (0.40370612 + 0.90148123 * b_ + a_ * (-0.27087943 + 0.61223990 * b_ + a_ * (0.00299215 - 0.45399568 * b_ - 0.14661872 * a_))));

  return ST(S, T);
}