Data and quicklooks from the Halo Photonics Streamline lidar are available at


https://engineering.arm.gov/~newsom/Doppler/offsite/xpia/Halo/


This includes the "raw" radial velocity data, as well as processed VAD winds, and vertical velocity statistics (variance, skewness, kurtosis, cloud base height, cloud fraction, cloud base vertical velocity, and velocity precision estimates).


The Halo maintained a consistent scan schedule throughout its deployment period (from March 6th to April 16th). The scan schedule was as follows:

• 8 beam PPI scan at 60 deg elevation once every 12 minutes.
• narrow sector scan toward light posts near the EHS stadium once per day.
• ~10 minute slant-path stare near 50-m level on the BAO tower once per hour.
• Vertical stares the rest of the time.

The Halo was operated using a 30-m gate size, and with a 1-second pulse integrate time. The maximum number of gates was set to 200. With the exception of a fairly minor software glitch on the April 9, the Halo functioned quite well. The glitch resulted in downtime during the latter half of April 9th, all of the 10th, and the first half of April 11th.