Updated tower files

A very small error in boom orientation (3 degrees) has been identified, and Gordon Maclean from NCAR has corrected the datafiles as of 13 Apr. Gordon says:

The netcdf files have been reprocessed with updated boom azimuths of 154 and 334.

This includes the 5 minute files at ftp://ftp.eol.ucar.edu/pub/archive/isff/projects/cabl/netcdf_qc_geo_notiltcor

and the high rate files at ftp://ftp.eol.ucar.edu/pub/archive/isff/projects/cabl/netcdf_hr_qc_geo_notiltcor

The high rate files have also been re-formatted. They now contain 12 hours of data instead of 4, and so for each day the files are named cabl_ntc_YYYYMMDD_HH.nc, where HH is 00 and 12.   If you've downloaded high-rate files before, you should replace the 00 and 12 files with the new ones and delete files with HH fields of  04,08,16 and 20.

Melting/falling ice

Dan pointed out on the call yesterday that when doing field work at the BAO in the vicinity of the guy wires (like at the lidar super-site or the UTD 200S location), we should be aware of the risks of falling ice/snow from guywires and from the tower itself. Hard hats are currently available at the building at the base of the tower, and some hard hats will be moved to the visitor center, as well. 

As part of a leveraged educational deployment (CABL, Characterizing the Atmospheric Boundary Layer), NCAR EOL is providing the sonic anemometers for the BAO tower as well as 1-2 surface flux stations and some soundings. Last Friday, part of one of the surface flux stations was installed, and the 300m sonic on the BAO is reporting into its data acquisition system. You can access these data visually using NCAR's "ncharts" app, available at http://datavis.eol.ucar.edu/ncharts/projects/CABL/geo_notiltcor . Variable names are explained at https://www.eol.ucar.edu/content/isfs-variable-names, and time is in UTC. There is currently about a 20-minute lag between reality and when the data appear in ncharts. Check out the cold front passage (below)!