Application technology of micro pulse lidar

Abstract

With the constant exploration to the atmosphere and the attention to the air quality of the living environment, the applications of micro-pulse lidar are more and more important. Micro Pulse Lidar can be used to observe the distribution of atmospheric aerosol and analyse structure, spatial and temporal evolution of the aerosol. The paper gives the introduction about the reference of micro-pulse lidar which is researched in the laboratory. Through the precision optical design, the blind area of Micro Pulse Lidar can be less than 45m. The portable requirement in the structure is implemented. The software function of micro-pulse lidar includes: extinction coefficiency monitoring, tracking the pollution source, distinguish spherical particular (fog) from no-sphercial particular(ice or dust)， simulating the Mass concentration, scanning date integrating with GIS, and so on. The average height of the boundary layer measured by micro-pulse lidar. The relationship between the cloud height and aerosol echo signal can be seen from the data received from micro-pulse lidar and the peak is at 6KM. By acquiring corresponding visibility values from probing different heights, a conclusion can be drawn that visibility and extinction coeffcient is inversely proportionate. Take a 24 hour day as a circle and divide it into several time periods. An atmosphere evolution diagram of the backscattering of the height of atmospheric boundary layer and the atmospheric aerosol particles can be derived according to the difference in sun radiation. Information like structure and the evolution characteristics of atmospheric boundary layer, cloud height, cloud cover structure, atmospheric visibility and space particles obtained by the laser radar detection provides a basis for the establishment of the correct atmospheric model. At the same time because lidar can monitor the emissions of industrial soot and detect the law of diffusion of environmental pollutants of the sky over cities, it is of great significance to the environmental monitoring of the atmosphere and atmospheric science research.