DIAL Lidar can be used to monitor the pollution concentration and distribution such as SO_2,NO_2,O_3 and so on.Proceeding in this manner,the results of the analysis are obtained in'real time'.We can obtain the two wavelength(on and off wavelength)by stimulating the Raman tube which filled with different gases in AML-2 mobile pollution-monitoring Lidar system.During the process of monitoring,it is necessary to move Raman tube continually so the 'real time' performance would be reduced In order to improve the...