27 September 2022
ARM operates several scanning coherent Doppler lidar systems at various sites around the globe. These instruments operate in the near infrared (1.5 microns) and provide measurements of radial velocity, attenuated aerosol backscatter, and signal-to-noise ratio. Systems are typically operated using a fixed scan schedule consisting of plan position indicator scans that are performed several times per hour and vertically pointing during other times. The DLPROF-WSTATS value-added product calculates profiles of vertical velocity statistics from these scans. This product provides measurements in clear air below the lowest cloud base.
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DLPROF-WSTATS computes quantities from 1Hz vertical staring data using a 30-minute averaging interval. The vertical resolution of the output is 30 meters, and the true time resolution is 30 minutes. Please note that the output is oversampled at 10-minute intervals.