DQRID : D020726.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/12/2001203212/24/20010531Incorrect
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Subject:
SGP/EBBR/E20 - Reprocess: Soil Heat Flow #2 and #4 incorrect
DataStreams:sgp30ebbrE20.b1
Description:
Soil heat flow #2 measurements had a negative offset.  Negative values were too small and 
negative values occurred when positive values should have.  This can occur when there is 
a poor wire connection or a J-panel over-voltage protection device has failed.

Soil heat flow #4 was incorrect because it's wires were loose from the connection
terminals.

Average soil heat flow, sensible heat flux, and latent heat flux were affected;
these can be recalculated using the remaining good sets of soil sensors as follows: 
    ave_shf = (g1 + g3 + g5)/3
    e = -(q + ave_shf)/(1 + bowen)
    h = -(q + e + ave_shf)
Suggestions: 
Measurements:sgp30ebbrE20.b1:
  • surface_soil_heat_flux_4
  • surface_soil_heat_flux_2
  • corr_soil_heat_flow_4
  • latent_heat_flux
  • soil_heat_flow_4
  • surface_soil_heat_flux_avg
  • corr_soil_heat_flow_2
  • soil_heat_flow_2
  • sensible_heat_flux
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