Robert J. Zamora Co PI NOAA/ESRL/Physical Science Division 
April 25, 2006
2004 NAME site at Estacion Obispo, MX
Latitude: 24.280 N, Longitude: -107.16 W, Elevation 27.0 m (ASL)
Version 4 Fortran 77/90 processing code by Robert Zamora
The data file contains radiative fluxes, ground heat heat fluxes, soil temperatures,
and soil wetness fractions derived by the Physical Sciences Division
of the NOAA Earth System Research Laboratory.
The data file, NAME_2004rad_soil.dat is a comma delimited ASCII file.
There are thirteen fields in each data record.

Field 1:  Year (UTC)
Field 2:  Julian day (UTC)
Field 3:  Time (UTC) of the start of the averaging period.
Field 4:  Downwelling IR Irradiance (W/m^2) Albrecht-Cox/Dutton-Fairall corrected.
Field 5:  Upwelling IR Irradiance (W/m^2) Albrecht-Cox/Dutton-Fairall corrected.
Field 6:  Downwelling Solar Irradiance (W/m^2) no thermal offset correction
Field 7:  Upwelling Solar Irradiance (W/m^2) no thermal offset correction
Field 8:  Soil Temperature (deg C) at 5.0 cm below surface.
Field 9:  Soil Temperature (deg C) at 10.0 cm below surface.
Field 10: Soil Temperature (deg C) at 15.0 cm below surface.
Field 11: Soil Temperature (deg C) at 50.0 cm below surface.
Field 12: Ground Heat Flux (W/m^2) at 4.0 cm below surface. (no storage correction)
Field 13: Volumetric Soil Wetness Fraction at 15 cm below surface.

Missing data flag = -999.9

IMPORTANT DISCLAIMER!!
Solar Irradiance measured using Eppley Precision Spectral Pyranometers
contain thermal offset errors. This low bias can be as large as 14.0 W/m^2 during
daytime. NOAA/ESRL/PSD has chosen to calculate irradiance from the raw thermopile 
output. We have NOT zeroed negative irradiance values returned by the PSP's at 
night. Users of the data should zero all negative irradiance values before 
computing net irradiance.

References: 

Philipona, R., 2002: Underestimation of solar global and diffuse
radiation measured at the Earth's surface. J. Geophys. Res., 107(D22), 
4645,doi:10.1029/2002JD002396
Zamora, R. J., E. G. Dutton, M. Trainer, S. A. McKeen, J. M. Wilczak, and Y.-T. Hou,
2005: The Accuracy of Solar Irradiance Calculations Used in Mesoscale Numerical
Weather Prediction. Mon. Wea. Rev., 133, 783-792.

The data in this file comes from the following sources:
 
Ventilated Eppley Precision Spectral Pyranometers (PSP)
Ventilated Eppley Precision Infrared Pyrgeometers (PIR)
Campbell CS-107 temperature probes
A Radiation Energy Balance Systems HFT-3 soil heat flux plate
A Campbell CS-616 Soil Water Content Reflectometer

The pyranometer calibrations were determined using the Baseline Surface Radiation
Network radiometers operated by NOAA/ESRL/GMD.
The pyrgeometer thermopile conversion and dome heating correction factors were 
derived usingthe NOAA/ESRL/GMD Blackbody cavity.
Calibrations for the Water Content reflectometer were derived using the in-situ
method of drying and weighing soil samples before and after the onset of the
2004 monsoon.