AWS data header 

TairC    average air temperature in deg C taken at 2 m
RH_%     average relative humidity in % taken at 2 m
VP_hPa   water vapor pressure in hPa computed from average RH
W_spd    average wind speed in m/s taken at 10 m (except at temporary sites)
W_vect   magnitude of vector-averaged winds in m/s taken at 10 m
Wdir     direction angle from North of vector-averaged winds taken at 10 m
WdirSD   standard deviation of 10 m wind direction computed by algorithm
BarohPa  barometric pressure in hPa taken at 1.5 m (not present at all sites)
Prcp_mm  precipitation in mm

Sensors added during May 1999 to Whitewater AWS.

New Whitewater AWS Sensors

IR          IR surface temperature in deg C taken at 4 m
Solar Down  solar irradiation in W m-2
Solar Up    short wave reflected from the surface in W m-2
Albedo      ratio Solar Up/Solar Down
SMperiod    time period reflecting soil moisture content in sec
SM          root zone volumetric soil moisture in % 

For more sensor information contact David Cook drcook@anl.gov
For more dataflow information contact Timothy Martin tjmartin@anl.gov

EOT