DQRID : D950626.8
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/11/1995010003/11/19950600Incorrect
03/11/1995153003/12/19951930Incorrect
03/10/1995210003/10/19952130Incorrect
03/20/1995153003/20/19951700Incorrect
03/16/1995183003/18/19951100Incorrect
03/13/1995043003/13/19950500Incorrect
03/19/1995210003/20/19950400Incorrect
more
Subject:
SBP/EBBR/E9 - Reprocess: Soil Heat Flow Sensor 5 Incorrect Data
DataStreams:sgp30ebbrE9.b1, sgp15ebbrE9.b1
Description:
Soil heat flow sensor #5 periodically outputted incorrect values during the
period above.  The output often indicated large negative heat flow.  The
sensor connections were tightened on March 20, 1995, which seems to have
corrected the problem.  The data affected (and thus incorrect) includes:

15 minute: mv_hft5
30 minute: shf5, c_shf5, g5, ave_shf, e, h.

The dates and times (GMT) of incorrect values are listed below.  Only half
hour times are listed.

03/10/95  2130
03/11/95  0100-0600, 1530-2330
03/12/95  0000-1930
03/13/95  0500
03/16/95  1830-2330
03/17/95  0000-2330
03/18/95  0000-1100
03/19/95  2100-2330
03/20/95  0000-0400, 1530-1700

The latent and sensible heat fluxes can be recalculated by using only soil
heat flows 1 through 4 to calculate the average soil heat flow,

ave_shf = (g1 + g2 + g3 + g4)/4

e = -(q + ave_shf)/(1 + bowen)

h = -(e + ave_shf + q)
Suggestions: 
Measurements:sgp30ebbrE9.b1:
  • latent_heat_flux
  • surface_soil_heat_flux_avg
  • soil_heat_flow_5
  • corr_soil_heat_flow_5
  • surface_soil_heat_flux_5
  • sensible_heat_flux
more
sgp15ebbrE9.b1:
  • soil_heat_flow_5_mv
more

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