NEU data file names are of the form
When location is a NEU site, it is a two part field of the form sitename-ly where ly is the site level number (l1, l2 or l3), e.g. easterbush-l3.
Examples of valid NEU data file names:
ceh-met_easterbush-l3_20060801_v01.na
ceh-met_easterbush-l3_20060801_30min-v01.na
ceh-met_easterbush-l3_20060801_c1-v01.na
ceh-met_easterbush-l3_20060801_c1-30min-v01.na