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27 lines
1.3 KiB
Markdown
27 lines
1.3 KiB
Markdown
# VehicleAirData (UORB message)
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Vehicle air data
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Data from the currently selected barometer (plus ambient temperature from the source specified in temperature_source).
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Includes calculated data such as barometric altitude and air density.
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[source file](https://github.com/PX4/PX4-Autopilot/blob/main/msg/VehicleAirData.msg)
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```c
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# Vehicle air data
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#
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# Data from the currently selected barometer (plus ambient temperature from the source specified in temperature_source).
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# Includes calculated data such as barometric altitude and air density.
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uint64 timestamp # [us] Time since system start
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uint64 timestamp_sample # [us] Timestamp of the raw data
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uint32 baro_device_id # Unique device ID for the selected barometer
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float32 baro_alt_meter # [m] [@frame MSL] Altitude above MSL calculated from temperature compensated baro sensor data using an ISA corrected for sea level pressure SENS_BARO_QNH
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float32 baro_pressure_pa # [Pa] Absolute pressure
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float32 ambient_temperature # [degC] Ambient temperature
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uint8 temperature_source # Source of temperature data: 0: Default Temperature (15°C), 1: External Baro, 2: Airspeed
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float32 rho # [kg/m^3] Air density
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uint8 calibration_count # Calibration changed counter. Monotonically increases whenever calibration changes.
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```
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