uint64 timestamp # time since system start (microseconds) uint64 timestamp_sample uint32 device_id # unique device ID for the sensor that does not change between power cycles float32 dt # delta time between samples (microseconds) uint8 samples # number of valid samples float32 accel_scale float32 gyro_scale uint8 FIFO_SIZE = 24 int16[24] accel_x # gyro in the FRD board frame X-axis int16[24] accel_y # gyro in the FRD board frame Y-axis int16[24] accel_z # gyro in the FRD board frame Z-axis int16[24] gyro_x # gyro in the FRD board frame X-axis int16[24] gyro_y # gyro in the FRD board frame Y-axis int16[24] gyro_z # gyro in the FRD board frame Z-axis float32 temperature # temperature in degrees Celsius uint32 error_count uint8 ORB_QUEUE_LENGTH = 8