LIDAR is similar to RADAR, using electromagnetic waves in the visible or near-visible spectrum to remotely investigate properties of a medium. CSU LIDAR is a Na fluorescence Lidar based on innovations developed at CSU, which can be used to determine Na density, temperature, zonal wind and meridional wind in the mesopause region (80-105 km) of the atmosphere both day and night for atmospheric wave and global change studies. The CSU Lidar Group homepage.