Simplificeret tryk til hojde
https://www.mide.com/air-pressure-at-altitude-calculator
https://en.wikipedia.org/wiki/Inertial_measurement_unit
https://www.engineeringtoolbox.com/air-altitude-pressure-d_462.html
https://en.wikipedia.org/wiki/Barometric_formula
https://en.wikipedia.org/wiki/Atmospheric_pressure