Lidar - ND Halo Scanning Doppler, Boardman - Raw Data

**Overview**

The University of Notre Dame (ND) scanning lidar dataset used for the WFIP2 Campaign is provided. The raw dataset contains the radial velocity and backscatter measurements along with the beam location and other lidar parameters in the header.

**Data Details**

1) A Halo photonics scanning lidar, owned by ND, was deployed and operated from 12/17/2015 to 02/09/2016. On 02/09/2016, this lidar was replaced by a Halo photonics scanning lidar owned by the Army Research Lab (ARL).
2) For information on the scanning patterns, refer to attached "ReadMe" file.
3) Data Period from 12/15/2015 to 02/09/2016: One data file per day (24 hours). File name of each daily data file has {boardman} as {optionalfields}. For example: lidar.z07.00.20150414.143000.boardman.csm.
4) Data Period after 02/09/2016: One scan file every 15 minutes, one stare file, and one background file every hour. File names have the following {optionalfields}: {background_boardman} for background files; {scan_boardman} for scan files; and {stare_boardman} for stare files. For example:
- lidar.z07.00.20150414.143000.background_boardman
- lidar.z07.00.20150414.143000.scan_boardman
- lidar.z07.00.20150414.143000.stare_boardman
5) Site information:
- Site: Boardman, OR
- Latitude: 45.816185° N
- Longitude: 119.811766° W
- Elevation (meters): 112.0

**Data Quality**

Raw data: no quality control (QC) is applied.

**Uncertainty**

The lidar measurements' uncertainty varies with the range of the measurements. Please refer to Pearson et al. (2009) for more details.

**Constraints**

1) Because of the change of lidars, the data were downloaded in different formats. Hence, the raw data (unfiltered) primarily are in two formats: *.csm and *.hpl.
2) The data were downloaded every one hour or 15 minutes. Hence, the datasets are not concatenated for continuous scans.
3) A lidar offset of +195 deg (to True North) was added to the azimuthal angles from the ND scanning lidars, spanning 12/17/2015 until 02/09/2016. Later, this was corrected for the data from 02/09/2016 as the lidar aligned to True North.