CEOP/EOP-1 GAPP Bondville Hourly Soil Heat Flux, Moisture, and Temperature Data Set

1.0 Contact Information

1.1 UCAR/JOSS Contact

   Steven F Williams
   Data Specialist
   P.O. BOX 3000
   Boulder, CO, USA, 80307-3000

   Telephone: 303-497-8987
   Facsimile: 303-497-8158

   E-Mail Address:

1.2 GAPP Contact

   Tilden Meyers 
   P.O. Box 2456 
   Oak Ridge, TN 37831-2456

   Telephone: 423-576-1233
2.0 General Description
This data set contains the Coordinated Enhanced Observing Period (CEOP)
Enhanced Observing Period 1 (EOP-1) Global Energy and Water Cycle
Experiment (GEWEX) Americas Prediction Project (GAPP) Bondville Hourly Soil
Heat Flux, Moisture,  and Temperature Data Set. This data set contains
hourly soil heat flux  (0cm depth), soil temperature (2, 4, 8, 16, 32, and
64cm depths), and soil moisture (10, 30, and 60cm depths) data from a
single station  for the CEOP EOP-1 time period (01 July 2001 to 30
September 2001). The University Corporation for Atmospheric Research/Joint
Office for Science Support (UCAR/JOSS) did not perform quality control
processing on this data set.

3.0  Detailed Data Description

This data set is also available on-line in 30-minute native format at under the link "CEOP EOP-1 Reference
Site Data Sets"

3.1 GAPP Bondville Algorithms

The algorithms used to produce the GAPP Bondville native format data are
not currently available. 

This CEOP/EOP-1 GAPP Bondville Hourly Soil Heat Flux, Moisture, and
Temperature Data Set hourly data set was formed by extracting the top of
the hour observations from the 30 minute native format data. The data were
provided in local standard time and were converted to UTC time by adding 6
hours to the local standard time. The soil heat flux provided in the
native format was  assumed to be at a depth of 0 cm.

More information regarding this site can be found under the CEOP Reference
Site Station Characteristics link on the UCAR/JOSS CEOP Data Management page

3.2 Station Information

The following is a complete description of the station information provided
with this CEOP GAPP Bondville data set. Table 1 details the station list
parameters. GAPP Bondville values for each parameter are listed in brackets
at the end of each line. The beginning and ending dates for the period of
coverage are in Universal Time Coordinated (UTC). The Identification Type
field is network dependent and indicates the source of the Identification
field. The Occurrence field is an integer value used to indicate
co-located stations. Note that when a particular parameter is unknown for
a station, either a blank, a question mark, or all 9's will appear in that
parameter's position. For a complete list of Country, State, and County
values, refer to the document in the references (Section 5.0). Possible
platform types and frequency values are listed in Tables 2 and 3, 
respectively.  Note that only those platform types present in the CEOP
EOP-1 data have been listed. 

Table 1

Parameter                Description
---------                -----------
Identification           ID in data.        [Bondville]
Identification Type      Internal ID number type.  [32]
Latitude                 Station Latitude.  [40.00610]
Longitude                Station Longitude. [-88.29000]
Occurrence               Station occurrence. [0]
Lat/Lon Accuracy         Number of digits accuracy 
                         in lat/lon values.  [2]
Name                     Expanded station name. [GAPP:Bondville]
Commissioned Flag        `(C)' indicates commissioned station,
                         `(N)' indicates station which is NOT
                         commissioned. [(N)]
Begin Period of Coverage Beginning date of period of coverage
                         (YYYYMMDD). [20010701]
End Period of Coverage   End date of period of coverage
                         (YYYYMMDD). [20010930]
Country                  Country in which station is located. [US]
State                    State code.  [17]
County                   County code. [???]
UTC offset               Hour Offset from UTC time. [0.00]
DST switch               'y' indicates station does switch to
                         Daylight Savings Time (DST). 'n' indicates 
                         station does not switch to DST.   [n]
Platform type            Collection Platform. See Table 2. [264] 
Reporting Frequency      Frequency of data collection.  [30min]
Elevation                Station elevation. [213]
Fixed/Mobile flag        Flag indicating if station has fixed
                         location. 'f' indicates a fixed station.
                         'm' indicates a mobile station. [f]

Table 2

Platform Type  Description
-------------  -----------
264            CEOP Reference Site Platform

Table 3                                            
Reporting Frequency
30 minute

3.3  Detailed Format Description
The CEOP EOP-1 GAPP Bondville Hourly Soils Data Set contains  11 metadata
parameters followed by parameter values for 26 soils depths (i.e.,
0,2,3,4,5,6,7,8,10,15,16,20,25,30,32,35,40,45,50, 60,64,85,100,125,150,175
cm). The metadata parameters describe  the station location and time at
which the data were collected and the record type. The record type
describes the type of data found on that record and is described in the
Table 4 below. The time of observation is reported both in Universal Time 
Coordinated (UTC) Nominal and UTC actual time.  Days begin at  UTC 0100 and
end at UTC 0000 the following day. Note that missing parameter values are
indicated by "-999.99". The table below details the parameters in each

Parameters                   Units 
----------                   -----
Date of Observation          UTC Nominal 
Time of Observation          UTC Nominal 
Date of Observation          UTC Actual
Time of Observation          UTC Actual
CSE Identifier               Abbreviation of CSE name
Reference Site Identifier    Abbreviation of Site name
Station Identifier           Reference Site Dependent 
Latitude                     Decimal degrees, South is negative
Longitude                    Decimal degrees, West is negative
Station Elevation            Meters 
Record Type                  Type of data in current record.
                             See Table 4.
Parameter Values             Parameter Values for 26 depths.

Table 4

Record Type    Description
-------------  -----------
SoilHtFlux     Soil heat flux in W/m2
SoilMoist      Volumetric soil water content in percent
SoilTemp       Soil temperature in Celsius
3.4  Data Remarks

This data set contains only the hourly observations  for the CEOP EOP-1
time period.  This data set is also available  on-line in native format at under the link "CEOP EOP-1 Reference
Site Data Sets".

4.0  Quality Control Processing

UCAR/JOSS performed limited gross limit and visual checks on this data set.
No data values have been changed.

5.0  References
Department of Commerce - National Institute of Standards and Technology
   (NIST), 1985: Federal Information Processing Standards Publication
   10-3 Countries, Dependencies, & Areas of Special Sovereignty.
   Department of Commerce - NIST, Washington, DC.