Change 'date_time' column to 'POSIXct' class
Change 'character'/'factor' classes to numeric class
Change 'q_emit_series' column to 'character' class
Obtain domain dimensions from CALMET output files
Get the first item from a vector list of GEO.DAT files
Obtain text lines of GEO.DAT file as a vector object
Obtain UTM zone and hemisphere text from 'geo_dat_lines'
Get the first item from a vector list of SURF.DAT files
Obtain text lines of SURF.DAT file as a vector object
Obtain time zone text from 'surf_dat_lines'