The meterological data are set up so that there are 10 minute, 30 minute, and 60 minute averages. 

	The data are presented several ways.  

	The first is an ASCII file containing all of the processed data  The file name is  "Met Data.txt" 
	The second is an excel file containing the same information but in a somewhat more friendly form. The file name is 
"Met Data All Revised.xls"
 
	The first column indicates the time period for the average.  
	The second column is a letter, (a,b,c, or x) indicating the type of average.
	The third column indicates the number of data points contributing to this average.

Yr 	- Year
JDay    - Julian Day  March 1st is Julian Day 60.  
Hr   	- Hour of day
u	- average wind speed in sonic coordinate system (sonic points to magnetic south).         m/s
v	- average cross wind speed in sonic coordinate system (sonic points to magnetic south).   m/s 
w	- average vertical wind speed in sonic coordinate system.     				  m/s
rhoc    -  carbon dioxide concentration								  ppm
rhovp   - 
ts      - Sonic air temperature (virtual temperature)  C
pli7500 - air pressure   kPascals 
Htrue   - sensible heat flux  W/m^2   with coordinate rotation and Webb-Pearman corrections    
LEcorr  - latent energy flux  W/m^2   with coordinate rotation and Webb-Pearman corrections      
CO2cor  - Carbon dioxide flux    milligrams/m^2-s     
Bratio  - Bowen ratio   H/LE
urot    - average wind speed    m/s        
udir    - average wind direction   degrees            
         NOTE:  The sonic was pointed towards magnetic south.  So the wind direction should be +/- 180 degrees as appropriate     
e       - water vapor partial pressure  kPascal      
q       - specific humidity, water vapor concentration in  kg water/kg air        
Tair    - Air temperature                  C
u*cr    - corrected u*, friction velocity  m/s     with coordinate rotation and Webb-Pearman corrections  
L 	- Monin Obukhov length	 meters


	There are also a large number of large text files containing the time series met data.  Each file is named for the time 
during which it was taken.  The file names are TS###L&&.txt where the ### is the julian date and && is the hour of the day.  
These files will let you look at the raw time series data so as to see the instantaneous wind speeds in each of the three directions.  
The sonic was pointed south, so positive u velocites are from the south.  W is the vertical wind speed. Also in these files is the 
long and short wave flux information (last 4 columns, in W/m^2).  Four jpgs are included to give you an idea of what this data looks
like.  It will show you the natural variability of the variables.

	All times are local times.

	
	The last file is called "covariance data.xls".  It contains the covariance information from the time series.  This information 
may be useful to estimate turbulent statistics.  If you want to do this, please contact us at the addresses below.  We can help.


	A compleat data set will stop on the 29th of March (Julian date 88).  At this writing, the last few days have not yet been 
collected.  If you want/need them contact us.


	Contact information

	Bill Eichinger					John Prueger
	University of Iowa				National Soil Tilth Lab
	william-eichinger@uiowa.edu			prueger@nstl.gov
	319-358-1053