VehicleMagnetometer (повідомлення UORB)
c
uint64 timestamp # time since system start (microseconds)
uint64 timestamp_sample # the timestamp of the raw data (microseconds)
uint32 device_id # unique device ID for the selected magnetometer
float32[3] magnetometer_ga # Magnetic field in the FRD body frame XYZ-axis in Gauss
uint8 calibration_count # Calibration changed counter. Monotonically increases whenever calibration changes.