Note: On 24 Sep 2002, calibration changes were made,  in the CR10X
datalogger, for the 0-5 cm soil  moisture measurements.  These new
calibrations are based on in situ determinations of soil moisture.

Previous soil moisture measurements can be corrected; the equations for
doing so are available from David Cook of ANL (see contact information
below).

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 Smileyberg AWS.

New Smileyberg AWS Sensors

15 minute:
RTS1        0-5 cm integrated soil temperature, unitless ratio
RTS2        0-5 cm integrated soil temperature, unitless ratio
RTS3        0-5 cm integrated soil temperature, unitless ratio
RTS4        0-5 cm integrated soil temperature, unitless ratio
RTS5        0-5 cm integrated soil temperature, unitless ratio
RSMP1       0-5 cm integrated soil moisture, unitless ratio
RSMP2       0-5 cm integrated soil moisture, unitless ratio
RSMP3       0-5 cm integrated soil moisture, unitless ratio
RSMP4       0-5 cm integrated soil moisture, unitless ratio
RSMP5       0-5 cm integrated soil moisture, unitless ratio
mvHFT1      5 cm soil heat flow in millivolts
mvHFT2      5 cm soil heat flow in millivolts
mvHFT3      5 cm soil heat flow in millivolts
mvHFT4      5 cm soil heat flow in millivolts
mvHFT5      5 cm soil heat flow in millivolts
Batt        battery voltage in volts

30 minute:
SM1         volumetric soil moisture in %
SM2         volumetric soil moisture in %
SM3         volumetric soil moisture in %
SM4         volumetric soil moisture in %
SM5         volumetric soil moisture in %
TS1         0-5 cm integrated soil temperature in degrees C
TS2         0-5 cm integrated soil temperature in degrees C
TS3         0-5 cm integrated soil temperature in degrees C
TS4         0-5 cm integrated soil temperature in degrees C
TS5         0-5 cm integrated soil temperature in degrees C
SHF1        5 cm soil heat flow in W m-2 
SHF2        5 cm soil heat flow in W m-2 
SHF3        5 cm soil heat flow in W m-2 
SHF4        5 cm soil heat flow in W m-2 
SHF5        5 cm soil heat flow in W m-2 
CSHF1       5 cm soil heat flow corrected for soil moisture content in  W m-2
CSHF2       5 cm soil heat flow corrected for soil moisture content in  W m-2
CSHF3       5 cm soil heat flow corrected for soil moisture content in  W m-2
CSHF4       5 cm soil heat flow corrected for soil moisture content in  W m-2
CSHF5       5 cm soil heat flow corrected for soil moisture content in  W m-2
CS1         specific heat of the soil in J kg-1 oK-1
CS2         specific heat of the soil in J kg-1 oK-1
CS3         specific heat of the soil in J kg-1 oK-1
CS4         specific heat of the soil in J kg-1 oK-1
CS5         specific heat of the soil in J kg-1 oK-1
CES1        0-5 cm change in soil heat storage with time in W m-2
CES2        0-5 cm change in soil heat storage with time in W m-2
CES3        0-5 cm change in soil heat storage with time in W m-2
CES4        0-5 cm change in soil heat storage with time in W m-2
CES5        0-5 cm change in soil heat storage with time in W m-2
G1          soil heat flow in W m-2
G2          soil heat flow in W m-2
G3          soil heat flow in W m-2
G4          soil heat flow in W m-2
G5          soil heat flow in W m-2
G           average surface soil heat flow in W m-2
PAR         photosynthetically active radiation in micromoles m-2 s-1

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

EOT