collates individual hourly files for multiple stations
CRN daily date is hosted on the ftp as a collection
of individual files for every station for every year. Once that
data has been downloaded
downloadCRN the individual
files can be collated into one monolithic file with this
function. In addition, a metadata file is created.
The default directory is the directory
where the source datafiles are downloaded to by the
The function will examine the directory and read the datafiles in that directory. It will create two output files and write them into your working directory: A data file and a metadata file. A date code is added to the file name of the data file.
The side effect is writing two datafiles for the hourly data: a file of data for all the stations and variable. And a metadata file.
The following urls give the necessary background and variable names. The readme is essential. http://www.ncdc.noaa.gov/crn/ ftp://ftp.ncdc.noaa.gov/pub/data/uscrn/ ftp://ftp.ncdc.noaa.gov/pub/data/uscrn/products/hourly02/README.txt