Readme for files Brule2FinalData.dat and Fence2FinalData.dat.

These data are from the Brule tower (N 46.466833, W 91.566743) and Fence tower (N 45.735359,
W 88.427305) sites that were part of the initial deployment of 
six sites across northern Wisconsin in the summer and fall of 2003.  This work was supported 
by the DOE project "Regional Ecosystem - Atmosphere CO2 Exchange via Atmospheric Budgets".  CO2 
was measured using a Licor LI-820 sensor.  Measurements were made at 1 Hz. and averaged for 
five minutes to reduce the random noise inherent in the LI-820 sensor.  Every two hours the 
system was calibrated by measuring four gasses of known CO2 levels.  Accuracy of the measurements
is expected to be better than +/- 1 ppm but has not been independently verified.

Please contact Scott Richardson (srichardson@psu.edu) with questions.

Data format is:

230.025,NaN
230.0257,NaN
230.0264,NaN
230.0271,352.584
230.0278,352.4792
230.0285,352.2784

Column 1 is day of the year.  
Column 2 is CO2 in ppm.  Each observation represents a 5-minute average CO2 concentration.
NaN indicates that either data was not available because a calibration cycle was taking
place or the data was deemed bad for another reason.