DQRID : D940818.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/31/1994210008/17/19941700Incorrect
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Subject:
SGP/EBBR/E26 - Soil Moisture Sensor Malfunction
DataStreams:sgp30ebbrE26.b1, sgp15ebbrE26.b1
Description:
Soil moisture sensor #1 at Cement, Ok, E26 began a slow drift downwards on
July 31, 1994.  This continued until the sensor was replaced at 1700 GMT on
August 17, 1994.  The downwards drift occured coincident with a constant
decrease in soil moisture at the site.  As a result, the average soil
moisture (for the set of five sensors) was reduced by only about 2% (for a
range of 10 to 22%), and thus had a negligible effect on the calculations
of sensible and latent heat flux.  The sm1 output dropped below zero at
times during August 14-17.

Soil Moisture #1 Data Fields:

15 minute: r_sm1

30 minute:  sm1
Suggestions: 
Measurements:sgp15ebbrE26.b1:
  • soil_moisture_1_r
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sgp30ebbrE26.b1:
  • soil_moisture_1
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