Measurement of cabin pressure during a flight with a smartphone

An aircraft cabin is used as a laboratory for studying the atmospheric pressure during a flight. All the different steps of the flight: take-off, cruise altitude climbing and landing are monitored with the use of the pressure sensor of a smartphone. Specific details of the atmospheric pressure during take-off and landing are given. Calculations are done for the aircraft nose elevation angle during take-off, with the relation between the optimized cabin pressure for the passenger comfort and the aircraft altitude.