1. 1 Laser Remote Sensing Optical Receiver & Detection System Laser Probe Gas R = Velocity  time R There can be: absorption, scatter and/ or fluorescence

2. Schematic diagram of a differential absorption LIDAR system Nd: YAG Laser 1.06 nm Monochromator PMT PMT Supply Digital Storage Oscilloscope Computer Newtonian Telescope DYE 550-590 nm SHG UV 275-285 nm SO 2 cell at remote distance Photo Diode Trigger Topographic Target The idea behind differential absorption lidar (DIAL)

3. Detection of molecules by DIAL DIAL SPECTRA OF SO 2 DIAL SPECTRA OF NO 2

4. 4 Argon Ion Laser Ring Dye Laser RF Driver Amp Spectrum Analyzer Lens Acousto-optic Device PMT Moving Target (water, aerosol) Telescope Beam splitter Computer DOPPLER LIDAR SETUP

5. 5 DOPPLER LIDAR RESULTS Measurement of velocity and turbulence profiles Measurement of flow rate of polluted water discharges Measurement of gaseous vapors discharges Acoustic Vibrations

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