VehicleAirData (UORB message)
c
uint64 timestamp # time since system start (microseconds)
uint64 timestamp_sample # the timestamp of the raw data (microseconds)
uint32 baro_device_id # unique device ID for the selected barometer
float32 baro_alt_meter # Altitude above MSL calculated from temperature compensated baro sensor data using an ISA corrected for sea level pressure SENS_BARO_QNH.
float32 baro_pressure_pa # Absolute pressure in Pascals
float32 ambient_temperature # Abient temperature in degrees Celsius
uint8 temperature_source # Source of temperature data: 0: Default Temperature (15°C), 1: External Baro, 2: Airspeed
float32 rho # air density
uint8 calibration_count # Calibration changed counter. Monotonically increases whenever calibration changes.