DQRID : D081024.1
Start DateStart TimeEnd DateEnd Time
08/18/2007000010/14/20091100
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Subject:
SGP/SWATS/E1 - Sensor failure, 5cm E
DataStreams:sgpswatsE1.b1
Description:
Both trise and tsoil for the 5cm E sensor began to drop out intermittently reporting both 
incorrect values and values of -9999 starting on 08/18/2007.  Since this date, there have 
been periods where values of -9999 have been reported continuously for months at a time, 
but the sensor always seems to come back eventually and report values that appear 
correct.  

Currently, this sensor is reporting normal values again but has failed as recently as 
10/08/08.  When this sensor is failing, it typically impacts tsoil_E, trise_E, soilwatpot_E, 
and watcont_E.  However, there are cases where tsoil_E appears OK while the other 
variables are incorrect.

Instrument was removed from service 20091014.
Suggestions: 
Measurements:sgpswatsE1.b1:
  • Soil Temperature, East Profile(tsoil_E)
  • Sensor Temperature Rise, East Profile(trise_E)
  • Volumetric Water Content, East Profile(watcont_E)
  • Soil Water Potential, East Profile(soilwatpot_E)
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