Title: Horizontal wind speed and direction profiles from Doppler lidar Location: Vinemont Airport Site for Vortex-SE Meso18-19 Field Campaign Lat/Lon: 34.2686 degN, -86.8581 degE Date updated: 27 July 2019 Contact: Dave Turner, NOAA (dave.turner@noaa.gov) System: Halo Streamline lidar, which is part of the CLAMPS-2 facility DOI: https://doi.org/10.26023/9YG4-VS40-XN13 --- Background Doppler lidars transmit pulses of 1.5 um wavelength laser energy into the atmosphere, which scatters off aerosol particles and hydrometeors. The lidar measures the intensity of this return, as well as its radial velocity. The lidar has a scanner which allows the system to scan anywhere in the hemisphere, and typically a fixed scan strategy is used. These data were derived from plane-parallel-indicator (PPI) scans, which were collected approximately every 2 minutes. In this scan, data were collected at 8 different azimuths each at 60 degrees elevation. These data were processed using the velocity-azimuth-display (VAD) technique by Dave Turner. The RMS field in the file indicates the goodness-of-fit to the assumed sine wave. The field "maxht" indicates the maximum height that the data should be used. Note that there are 1-sigma error bars on the lidar wind profiles. This dataset was collected at the Vinemont Airport near Cullman, Alabama during the VORTEX-SE Meso18-19 field campaign. This lidar is the Halo Streamline system, which is part of the Collaborative Lower Atmospheric Mobile Profiling System (CLAMPS-2). --- END