For most FCRN sites, 3 file types exist in the "Flux" and "Meteorology" 
directories.  Content has been standardized but may vary slightly between 
stations and sites.


Flux 
----

   1. Ancillary: contains raw data used to derive Carbon, Water and 
Energy fluxes and ultimately Net Ecosystem Productivity information.
Includes CO2 profile, tree bole, and soil heat flux data.

   2. ComputedFluxes: contains Carbon, Water and Energy flux data.  

   3. NEP: contains Net Ecosystem Productivity, Gross Ecosystem 
Productivity and Respiration information.


Meteorology
-----------

   1. Ancillary: contains a subset of Meteorological variables that 
were used to derive and quality assure some variables in the "Main" 
directory. Includes variables such as:  instrument reference 
temperatures, battery voltages and logger temperatures.

   2. Main:  contains the most complete sub set of meteorological 
variables, where most have been corrected and some have been derived, 
but none have been gap-filled.  Includes variables such as: temperature, 
humidity, radiation, precipitation, wind, atmospheric pressure, soil 
temperatures, snow temperatures, snow depth and water table height.

   3. Summarized:  contains data that have been summarized from the Main 
subset.  Variables have been aggregated (eg. 4 tower top temperature 
measurements have become one) and gaps have been filled.