High Spectral Resolution Lidar (HSRL) data collected aboard the NSF/NCAR GV HIAPER (Gulfstream-V High-performance Instrumented Airborne Platform for Environmental Research) (N677F) during the SOCRATES (Southern Ocean Clouds, Radiation, Aerosol Transport Experimental Study) project from 15 January 2018 to 24 February 2018. The data are in NetCDF format and are available as hourly files. This data set is intended for the expert user. The data is also available in CfRadial format at the link in the "Related links" section below. The NetCDF data is in a range centered format similar to that of the CfRadial data. However, the NetCDF contains data processing variables that are not necessarily needed by end users and does not have all its variables and metadata in line with the current CfRadial standard and cannot be read by display programs such as HawkEye. In general, data users should use the HSRL-HCR merged data or HSRL only CfRadial data linked below unless there is need for the underlying signals (and in those instances users are still strongly encouraged to contact EOL Data Support to ensure observational data provided is meeting the criteria of the user).