def T_z_from_L_2_to_L(self, Tsurr, C3, C4, Param_m, z2):
    T = ((Tsurr + (C3 * np.exp((Param_m * z2)))) + (C4 * np.exp(((- Param_m) * z2))))
    return T
def T_z_from_L_2_to_L(self, Tsurr, C3, C4, Param_m, z2):
    T = ((Tsurr + (C3 * np.exp((Param_m * z2)))) + (C4 * np.exp(((- Param_m) * z2))))
    return T