说明：  总共32组数据，每一组2028个点，分别对应激光雷达32条线。 需要用到16组线，第二个个数字对应mat组数，第三个数字对应激光角度。 激光雷达安装高度 0.8米。
(A total of 32 sets of data, 2028 points in each group, correspond to 32 lines of lidar respectively. Sixteen sets of lines are needed, the second number corresponds to the mat array, and the third number corresponds to the laser angle. The installation height of lidar is 0.8 meters.)