首页|Remote sensing of air pollution incorporating integrated-path differential-absorption and coherent-Doppler lidar
Remote sensing of air pollution incorporating integrated-path differential-absorption and coherent-Doppler lidar
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An innovative complex lidar system deployed on an airborne rotorcraft platform for remote sensing of atmospheric pollution is proposed and demonstrated.The system incorporates integrated-path differ-ential absorption lidar(DIAL)and coherent-doppler lidar(CDL)techniques using a dual tunable TEA CO2 laser in the 9-11 pm band and a 1.55 pm fiber laser.By combining the principles of differential ab-sorption detection and pulsed coherent detection,the system enables agile and remote sensing of at-mospheric pollution.Extensive static tests validate the system's real-time detection capabilities,including the measurement of concentration-path-length product(CL),front distance,and path wind speed of air pollution plumes over long distances exceeding 4 km.Flight experiments is conducted with the helicopter.Scanning of the pollutant concentration and the wind field is carried out in an approxi-mately 1 km slant range over scanning angle ranges from 45°to 65°,with a radial resolution of 30 m and 10 s.The test results demonstrate the system's ability to spatially map atmospheric pollution plumes and predict their motion and dispersion patterns,thereby ensuring the protection of public safety.
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