DQRID : D940711.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/18/1994020006/25/19941930Does not affect quality
06/25/1994230006/28/19941600Does not affect quality
06/15/1994210006/15/19942130Does not affect quality
06/16/1994213006/17/19941530Does not affect quality
06/17/1994190006/17/19941930Does not affect quality
06/15/1994230006/16/19940030Does not affect quality
more
Subject:
SGP/EBBR/E9 - Reprocessing Notice (RID 13)
DataStreams:sgp30ebbrE9.b1, sgp15ebbrE9.b1
Description:
See below for details of reprocessing that was completed on 20150121. Original DQR 
category: 4 (Red, Incorrect)

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Failure of soil heat flow sensor #5 at E9, Ashton, KS resulted in incorrect
data values for 6 fields for much of the period of time listed above.  The
soil heat flow values from #5 were so large (in the absolute) that it
deleteriosly affected the soil heat flux average and the sensible and
latent heat fluxes.  The fields affected were:

30 minute: shf5, c_shf5, g5, ave_shf, e, h

15 minute: mv_hft5.

I list only the 30 minute times affected below; it can be assumed that the
15 minute value contained in the half hour are incorrect.  Sensor #5 was
replaced at 1545 GMT on June 28.  Old S/N 923029, new S/N 923092.  Half hour
1600 GMT is missing due to having to reload the CR10 program with a new shf5
calibration.  Sensible and latent heat fluxes can be recomputed by averaging
soil heat flow sensors 1-4; use the following equations:

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

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

h = e * bowen,

where g is total soil heat flow, q is net radiation, and bowen is Bowen
Ratio.

Affected half hours:

Date          Times (GMT)

6/15    2130, 2300, 2330
6/16    0000, 0030, 2130-2330
6/17    0000-1530, 1900, 1930
6/18    0200-2330
6/19    All
6/20    All
6/21    All
6/22    All
6/23    All
6/24    All
6/25    0000-1930, 2300, 2330
6/26    All
6/27    All
6/28    0000-1600
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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