Default pressure calculations:
| Variable | Explanation |
|---|---|
| Po | Instant barometric pressure of the sensor on the sensor height in hectopascal (hPa) |
| ΔH | Difference in the height (m) between sensor and station height (reference point) |
| G | Acceleration of gravity (m/s2) |
| R | Constant of gas equation for dry air (287 J/kgK) |
| T | Air temperature in kelvin (K) |
| H | Station height (for example reference point) in meters (m) |
| T0 | Reference temperature (288.15 K) |
| A | Lapse rate (0.0065 K/m) |
| e | Water vapor pressure (hPa) |
| Ch | Elevation constant, 0.1074 + (0.0000251 * H) |