DQRID : D980413.6
Start DateStart TimeEnd DateEnd Time
01/19/1998220001/21/19980230
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Subject:
SGP/EBBR/E2 - EBBR E2 Incorrect Data
DataStreams:sgp15ebbrE2.b1, sgp5ebbrE2.b1, sgp30ebbrE2.b1
Description:
During the indicated period, when either home signal is in the hundreds, all
soil heat fluxes, soil moistures, net radiation, air temperatures, bowen 
ratio, sensible heat flux, and latent heat flux are incorrect.  This 
condition usually results from an AEM circuit problem that allows the home 
signals to go high and corrupts the data.  The cause has never been 
determined.

Comments added by Marv Wesely: 
David Cook said that this is a very rare occurence; it's happened about
three times in total for all EBBRs.  The problem might be on the circuit
boards (moisture?), but that is only a guess. The problem has always
disappeared by itself after a while.
Suggestions: 
Measurements:sgp30ebbrE2.b1:
  • Soil heat flow 5, corrected for soil moisture(corr_soil_heat_flow_5)
  • Soil heat flow 3, corrected for soil moisture(corr_soil_heat_flow_3)
  • Soil heat flow 4, corrected for soil moisture(corr_soil_heat_flow_4)
  • Soil heat flow 1, corrected for soil moisture(corr_soil_heat_flow_1)
  • Soil heat flow 2, corrected for soil moisture(corr_soil_heat_flow_2)
  • Bottom air temperature(temp_air_bottom)
  • Soil heat flow 5(soil_heat_flow_5)
  • Soil heat flow 4(soil_heat_flow_4)
  • Soil heat flow 3(soil_heat_flow_3)
  • Surface sensible heat flux(sensible_heat_flux)
  • Soil heat flow 2(soil_heat_flow_2)
  • Bowen ratio(bowen_ratio)
  • Soil heat flow 1(soil_heat_flow_1)
  • Net radiation(net_radiation)
  • Surface soil heat flux 1(surface_soil_heat_flux_1)
  • Surface soil heat flux 2(surface_soil_heat_flux_2)
  • Surface latent heat flux(latent_heat_flux)
  • Top air temperature(temp_air_top)
  • Soil moisture 2, gravimetric(soil_moisture_2)
  • Soil moisture 1, gravimetric(soil_moisture_1)
  • Soil moisture 4, gravimetric(soil_moisture_4)
  • Soil moisture 3, gravimetric(soil_moisture_3)
  • Soil moisture 5, gravimetric(soil_moisture_5)
  • Surface soil heat flux, average of fluxes 1-5(surface_soil_heat_flux_avg)
  • Surface soil heat flux 5(surface_soil_heat_flux_5)
  • Surface soil heat flux 3(surface_soil_heat_flux_3)
  • Surface soil heat flux 4(surface_soil_heat_flux_4)
more
sgp5ebbrE2.b1:
  • Top air temperature(temp_air_top)
  • Bottom air temperature(temp_air_bottom)
  • Net radiation(net_radiation)
more
sgp15ebbrE2.b1:
  • Soil moisture 2 (resistance)(soil_moisture_2_r)
  • Soil moisture 1 (resistance)(soil_moisture_1_r)
  • Right air temperature(temp_air_right)
  • Soil moisture 4 (resistance)(soil_moisture_4_r)
  • Soil moisture 3 (resistance)(soil_moisture_3_r)
  • Net radiation (mV)(net_radiation_mv)
  • Soil heat flow 3 (mV)(soil_heat_flow_3_mv)
  • Soil heat flow 5 (mV)(soil_heat_flow_5_mv)
  • Soil moisture 5 (resistance)(soil_moisture_5_r)
  • Soil heat flow 2 (mV)(soil_heat_flow_2_mv)
  • Soil heat flow 4 (mV)(soil_heat_flow_4_mv)
  • Soil heat flow 1 (mV)(soil_heat_flow_1_mv)
  • Left air temperature(temp_air_left)
more

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