1. Introduction

The intent of this web site is to assist new users of NCAR/EOL/RAF-produced aircraft data if they would like to use R in their data analysis projects. The intent here is to provide “layers”, starting with a very simple guide to constructing preliminary plots and extending to more advanced uses of R, RStudio, and knitr to produce manuscripts and reproducible and documented data-analysis projects.The emphasis here is on “Ranadu”, an R package that is intended to facilitate use of the data archives produced by the data systems on the NSF/NCAR/EOL/RAF research aircraft. (NSF=National Science Foundation; NCAR=National Center for Atmospheric Research; EOL=Earth Observing Laboratory; RAF=Research Aviation Facility) All the recent data files are in netCDF format, so that is the format emphasized here. Those files contain measurements made in field campaigns that use the NSF research aircraft operated by NCAR, presently consisting of a C-130 and a Gulfstream V. A list of recent projects is available at this EOL web page, and data requests can be made via links on that page. Information regarding the instruments and the processing algorithms are available at these respective web sites: https://www.eol.ucar.edu/aircraft-instrumentation and ProcessingAlgorithms.pdf. The latter also provides references to the netCDF format, the variable names in common use, and algorithms used to calculate the variables in the data files.