DQRID : D090320.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/20/2009000010/14/20091620Suspect
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Subject:
SGP/SWATS/E1 - Instrument failure
DataStreams:sgpswatsE1.b1
Description:
The diurnal temperature change in the tsoil measurements from all sensors installed below 
5 cm at this facility appear questionable.  On a daily basis, the diurnal trends in the 
tsoil measurements from depths below 5 cm did not match the above ground tref measurements 
or the tsoil measurements from the 5 cm W sensor (the 5 cm E sensor has failed). The 
tsoil measurements from these deeper sensors began to decrease prior to solar noon nearly 
every day. Also, the magnitudes of the diurnal change in these instruments appear to be the 
same for all sensors (Normally, the diurnal changes in tsoil are damped as we progress 
deeper below the surface).  

Attempts to correct the problem were unsuccessful until the time of site decommissioning.  
This facility was decommissioned and maintenance efforts ceased 10/1/2009.
Suggestions: 
Measurements:sgpswatsE1.b1:
  • tsoil_E
  • tsoil_W
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