DQRID : D960119.5
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/07/1996053001/09/19961730Suspect
more
Subject:
SGP/EBBR/E7 - Soil Moisture Probes Offscale
DataStreams:sgp15ebbrE7.b1, sgp30ebbrE7.b1
Description:
DQR No:                               Platform: EBBR

Subject: E7 Soil Moisture Probes Offscale

Date Submitted:  January 19, 1996
Submitted By:                         _x_  Instrument Mentor
                                      ___  EST Member
                                      ___  Science Team Member
                                      ___  Other _____________________________

For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.

Platform/Measurement: EBBR/Soil Moisture Probes
        What level data: (raw,a0,a1,b1,c1 etc): a1 (15 and 30 minute)

  What location was the data collected at: E7, Elk Falls, KS

  Period of time in question (Times vary for different days)

        Date 01/07/96   Time 0530-2400 GMT  Probe sm2
                             0530-2130 GMT        sm4
                             1100-1900 GMT        sm5
             01/08/96        0000-2400 GMT        sm2
                             0130-2300 GMT        sm4
                             0130-2030 GMT        sm5
             01/09/96        0000-2200 GMT        sm2
                             1130-1900 GMT        sm4
                             1130-1730 GMT        sm5

 Data should be labeled:
 ___  questionable                      ___  All data fields affected
 _X_  incorrect                         _X_  Only some data fields affected
 ___  wrong calibration
 ___  others

 Discussion of Problem:

During numerous periods within the days listed above, individual soil moisture
probes indicated high or offscale, on the dry side.  The cause of the
problems is unknown.  Data since 9 January 1996 has been correct.
Recalculation of ave_shf, e, and h must be made using only the soil moisture
sets with correct soil moisture values.

Affected data values are (# for probe number):

15 minute: rr_sm#

30 minute: sm#, c_shf#, cs#, ces#, g#, ave_shf, e, h

Sensible, latent, and soil heat fluxes can be recalculated using the soil
probe sets that provide correct data.  For example, if soil moisture 2 is
incorrect,

ave_shf = (g1 + g3 + g4 + g5)/4

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

h = -(e + ave_shf +q),


If soil moisture 2 and 4 are incorrect,

ave_shf = (g1 + g3 + g5)/3

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

h = -(e + ave_shf +q),


If soil moisture 2, 4, and 5 are incorrect,

ave_shf = (g1 + g3)/2

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

h = -(e + ave_shf +q),

Other observations/measurements impacted by this problem:

see above

Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)

Flag data with this comment.

Data Processing Notes                Date

-------------------------------------------------------------------
END
Suggestions: 
Measurements:sgp15ebbrE7.b1:
  • soil_moisture_4_r
  • soil_moisture_5_r
  • soil_moisture_2_r
  • soil_moisture_3_r
  • soil_moisture_1_r
more
sgp30ebbrE7.b1:
  • soil_moisture_1
  • soil_moisture_4
  • soil_moisture_5
  • soil_moisture_2
  • soil_moisture_3
  • soil_heat_capacity_2
  • soil_heat_capacity_1
  • soil_heat_capacity_5
  • surface_soil_heat_flux_avg
  • soil_heat_capacity_4
  • soil_heat_capacity_3
  • sensible_heat_flux
  • latent_heat_flux
  • surface_soil_heat_flux_4
  • surface_soil_heat_flux_5
  • surface_soil_heat_flux_2
  • surface_soil_heat_flux_3
  • surface_soil_heat_flux_1
  • corr_soil_heat_flow_2
  • corr_soil_heat_flow_3
  • corr_soil_heat_flow_4
  • corr_soil_heat_flow_5
  • energy_storage_change_5
  • energy_storage_change_3
  • corr_soil_heat_flow_1
  • energy_storage_change_4
  • energy_storage_change_1
  • energy_storage_change_2
more

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