The Scheimpflug lidar technique has been widely developed for atmospheric remote sensing during recent years. However, the correlations or discrepancies of the lidar signals measured by the Scheimpflug lidar (SLidar) technique and the conventional pulsed lidar technique, which is crucial for understanding the measurement results of the SLidar technique, has yet been investigated. In this work, a 520-nm Scheimpflug lidar system and a conventional 532-nm pulsed lidar system have been developed for comparison studies on a near-horizontal measurement path.
This work demonstrates a green-band Scheimpflug lidar system by employing a high-power continuous-wave 520-nm laser diode as the laser source and an image sensor as the detector. Atmospheric remote measurement was continuously performed from October 28th to November 3rd on a near horizontal path, while a severe haze occurred during this period. The time-range backscattering map is obtained and the distribution of the atmospheric extinction coefficient is retrieved from the lidar signals based on the Fernald inversion algorithm. The spatial-averaged aerosol extinction coefficient shows good linearity with the PM10/PM2.5 concentrations measured by a local national pollution monitoring station.
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