uint8 COVARIANCE_TYPE_UNKNOWN=0
          uint8 COVARIANCE_TYPE_APPROXIMATED=1
          uint8 COVARIANCE_TYPE_DIAGONAL_KNOWN=2
          uint8 COVARIANCE_TYPE_KNOWN=3
          
 std_msgs/msg/Header header
          
 sensor_msgs/msg/NavSatStatus status
          double latitude
          double longitude
          double altitude
          double[9] position_covariance
          uint8 position_covariance_type