Title:		Horizontal wind speed and direction profiles from Doppler lidar
Location:	Belle Mina, AL Site for Vortex-SE 2018 Campaign
Lat/Lon:	34.69028 degN, -86.88461 degE
Contact: 	Dave Turner, NOAA (dave.turner@noaa.gov) or Elizabeth Smith, NOAA (elizabeth.smith@noaa.gov)
System:  	Halo Streamline XR lidar, which is part of the CLAMPS-2 facility

--- 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 5 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. Verify that the orientation is correct before using wind direction or components. These data may not be rotated!

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