Relative to F_eff

Again, from Eq. (30), assuming F_eff and B_eff are independent,

$$\frac{1}{Tcal} \frac{\partial Tcal}{\partial F_{eff}} = \fra... ...}} + \frac{1}{\frac{T_{cab}-T_{emi}}{T_{cab}-T_{atm}}-F_{eff}}$$ (44)

which is of the order of 1.4 for the numerical values in Eq. (31). The first term must be omitted if one assumes B_s = F_eff, and in this case the derivative is of the order of 0.26.