BHP Correction Factor (\(K_g\)):

\[ K_g = \frac{1013}{P_b} \times \left(\frac{T + 273}{293}\right)^{0.5} \]

Where:

• \(K_g\) is the BHP correction factor.
• \(T\) is the ambient air temperature, °C.
• \(P_b\) is the total atmospheric pressure, mb.